Q1: Can I control EZ App loco using EZ Command DCC #10, "as if" the EZ App loco was running on straight DC...?
Q2: Will EZ App loco be damaged?
Q3: Will EZ App loco respond to the EZ Command DC (#10) control? 

I have NIB Bachman HO S4 and GP30 with nasty LOUD motor noise when they run. With shells removed... bare chassis they run like a finely tuned sewing machine with almost silent running. Without their shells I just hear very low motor hummmmm, and metal wheels on rails and a lovely (to me) 'click-click' when crossing rail joints. Put shells back on and that LOUD nasty motor noise returns.
Obviously the shell itself is becoming a sounding board, which then amplifies the motor noise (by a factor of 10 or 20). I'm not the first to have this situation... Has anyone found the primary source of the problem and what was your solution?

Bach-Man what say you??? [Is it a design or mfr issue I can fix?] Never had this issue with Walthers Mainline or Proto, Athearn Genesis or Kato. I have one Atlas with similar "noise by shell" problem, but it's volume is 10x less than inherent Bachmann noise...
I've posted this question on other forums and gotten weird answers from 'turn UP the X-mas music' to 'wear ear plugs'. Nobody knows the source or reason why Bachmann shells increase motor noise by 10-20 times. And nobody has any idea how to quiet them down. Bachmann designers might know the solution and should share it with Bachmann purchasers. 
I only run yard speed and double yard speed on my layout... so any LOUD motor noise is very unpleasant... and unnecessary.

I have a few Digitrax 8Pin (DH165IP) decoders. I have a DC Proto 2000 "DCC-ready" with a 9Pin socket. Can I use the Digitrax 8Pin in the 9Pin socket. I realize I'll loose a DCC function or two. I'll match up "P1" pin to "P1" socket hole.
Will it run OK on DCC (and DC) using a 8Pin decoder, or will it totally destroy something... and 'toast' all the electronics...?
Has anyone ever put a 8Pin DCC decoder in to a 9Pin socket? 
Thanks for your thoughts...

I thinking of switching to TT (table top) scale (1:120) from HO (1:87).
I run 64 feet of HO track on 4x8 sheet of plywood... I think I can double that by going to TT scale. I could also set-up TT in the RV.
Does anyone have experience with TT scale???
I would also buy TT gauge EZ-Track if and when Bachmann makes it. Lots of chatter on TT scale on other forums.
Any thoughts...