I am constructing a layout in our 30' x 40' attic.  I would like to run a double track main line around the perimeter of this space but not sure how to handle the curves.

Is it possible to bend / tweak the Bachmann curve track a little bit to increase the radius so the outside main line is concentric with the standard inside main line curve?

I don't want to use brass track from other manufacturers unless there is just no other way. 

Surely, someone here has solved this problem before.  Thanks in advance.
Kybaugh.

I'm new to the board and new to the large scale hobby, having just purchased my first Bachmann sets this holiday season. 

I picked up a Northern Lights set at Sams' Club for what appeared to be a steal of a deal at only $117.  Then I found this board and started reading.  Since then I've added a Wonderland Flyer set (#90045, I think) so now I also have an Annie locomotive. 

My question is this.  I often see reference to set ID numbers on Ebay and other online sellers, but for train sets that must be discontinued items.  Is there a master list posted or available somewhere, so a newbie like me can find info on the different sets offered over the years, or for example, if I purchase a caboose from set 90028, can I look up set 90028 and find out what other cars belong to that set?

Sorry to be so long winded.  Thanks in advance for any help.