trmwf:
The 2-6-0 was never intended for DCC so the installation of one is not particularly easy (my opinion).  See www.pacificcoastairlinerr.com/mogul_tsunami  for a great presentation of what is involved.
OldStone    O & W RR

Ray:
The first one I grabbed is 1-11/16" wide across the "bucket".  Hope this helps.
OldStone    O & W RR

According to the 2007 catalog there is one (Item No. 27499) which is yellow with brown ends and roof.

OldStone     O & W RR

Brunor:
If you have not already done so, check www.pacificcoastairlinerr.com/of_sound/  to see how Harold does it with the two large speakers.  I did this with the light steam Tsunami on a 2-6-0 and the results are fantastic!  I am heartily in favor of using the entire tender shell as a sound box and installing the biggest speakers that will go in there.  That big shell is one of the best things about the On30 scale vs HO.  Good luck....the Tsunami will put you in a whole new world.
OldStone   O & W RR

The one I looked at (in John Weigel's Peterboro RR booth at the last show) had two vertically-mounted motors in the box car, each with a shaft going through the floor to spin a dime-size pad below.   They were located between the trucks, one (at the front) to clean the right track while the other (at the rear) does the left.  The easily-replaced pads seem to be a hard felt and are supposed to be used dry.  As I recall, the "street price" is somewhere around $100.  The car is quite heavy.  Depending, of course, on the unknown friction the pads create, I'm guessing that my Climax might pull it up a 3% grade but suspect my Mogul wouldn't.  Hope this is helpful.

OldStone,  O & W RR

If you want to see one of these...in a Bachmann On30 boxcar...go to the "King of Green Boxes", John Weigel (Peterboro RR) at one of the shows such as Timonium, Upper Marlboro, et al.

Don't know anything about pier sets, but......
My On30 Mogul "spins out" on a 3% grade if I pull three passenger cars.  It makes out fine with two.  I do have a heavier-than-normal tender with all-wheel pickup (my first Tsunami instal) so that is probably adding to the load.  However, I find that I am completely satisfied with a "train" of Mogul-Combine-Passenger (one).
The 2-6-0 is an earlier design and quite light-weight.  The 2-8-0 would probably do better, but I don't have one.  Since I'm happy with my 2-car pass. trains I haven't tried adding weights to the Mogul....has anyone else on this thread?

OldStone,  Chief Supt. of Weights and Measures, O & W Rwy.

I followed Harolds methods to put the Tsunami in my 2-6-0 and also his thoughts on speakers, etc to install a Soundtraxx DSX in my Railtruck.  A lot of work but well worth the effort!

Pat:
You might try hminky@pacificcoastairlinerr.com.  One of Harold's methods would probably work....such as he used on the Mogul tender, or the one where he bent the Kadee coupler spring and applied one to each side of the truck.  Have been thinking of doing this myself, to see if it would stop the "flicker".  Cheers. 

Hdymek:
There is no different Bachmann On30  2-6-0 with or without DCC to put your shell on.  You are back to the excellent advice offered by Hunt and EBTBOB.
OldStone, O & W Rwy

I am tempted to say, "yes, it can", but will instead say I took mine off without damaging anything.  It all depends, I suppose, on how much glue they used during assembly, if any.  There is a tab on each side of the cab that fits into a slot in the floor....these are easy to see.  An Xacto chisel blade is very useful here for prying. There is a vertical slot in the side of the boiler on each side that the cab wall slides down into (a VERY tight fit and almost impossible to see until you get things moving).  One must look out for pipes, whistle arm, etc. that plug into or overhang the cab.  You will probably get additional advice in the next few hours.  Happy RRing!

Cheers,  OldStone,  O & W RR

Good Afternoon All:
Just paid a visit to my local dealer...he is selling the Cornerstone 90' model for $30.00.  Hard to beat, and it will handle any On30 loco Bachmann has made yet.  It will, however, require a scratch-built deck, if you want one.  The HO scale deck that comes with it is too narrow.
Cheers,  Oldstone
CEO,  O & W RR

Good Mornin
The Peco looks good.  No price given.  All my turnouts are Peco....excellent products.  I've been using the Walthers (Cornerstone) 90' (12 3/8" bridge) model, set up for the "armstrong" (manual) method for some time.  Works great for my 2-6-0 and only cost $40.00 retail.  Motorizing kit is $20 more.
Most installs I see run the incoming and outgoing rails over the lip of the pit wall.  Being a contrary Irishman, I run the bridge rails out over the pit wall with the incoming and outgoing rails stopping just short of it.  This lets me lift the whole assembly (pit, bridge, etc.) out of the table at any time, for maintenance or working in the space below it.  This may not be prototypical but it has saved me lots of time.  Food for thought.
Cheers,
OldStone, "Armstrong" of the O & W RR

Top O' The Mornin to Ya!
Question:  Does the operator of a goose or railtruck belong on the left (as a driver?) or the right (as an engineer?)?  I have seen models done both ways....how did they do it "for real"?  Or is this a case where we refer to "Rule Number One"?
Thanks for your help.

OldStone, Chief Goose Herder,  O & W RR

Am building a pair of water tanks (towers) for the O & W.  In some of the articles, photos, etc. I've read on the subject there is a spike, called a "finial" by one author, in the center of the roof, at the highest point.  None have mentioned lightning rods but it causes me to wonder.  Did they have lightning rods on RR water towers at the turn of the century?