Thanks, I'll check with my local hobby shop.

I'm running a 4-8-4 J type (American Freedom Engine) on a 4% grade pulling 13 Old-time Pullman cars (scale weighted), without the need for a helper engine, and planning a shay mountain track at 7% (I'm still building) but the shay will only be pulling 4 50' old-time Pullman cars. I also have a 43 car freight train that I am planning to double head with a 2-8-0 consolidation and another engine (haven't made a choice on the second engine yet) that will also be going up that 4% grade. Years ago I was in a model railroad club, and tested the 4-8-4 Lionel HO J class I had at the time with my freight cars + my passenger cars on a 2% grade and it was able to pull all of that without an issue (all of my cars are scale weight 1 ounce per inch of length)

I have two locomotives that I want to convert to DCC with sound, one is DCC ready, the other has DCC for speed, direction, and lighting. there are versions of both available with sound, but they were not available with sound when I made my purchase, I have the diagrams of both versions (Downloaded from here today) Can I just order the parts through my local hobby shop or directly from Bachmann or would I have to go with after-market parts? and If I have to go aftermarket, I would like recommendations...