I guess my question is, why is everyone so caught up in the need for two motors? First the real 44 tonners had very limited pulling power. A local RR (the FJ&G) had one and it had trouble pulling more than 4 loaded 40' boxcars and a caboose up the grade (500' rise over 3 miles) from Fonda (NY) to Johnstown (NY).
On my model RR a Railking Alco PA downgraded to a single 385 can motor will pull a Railking B unit and 6 or 7 passenger cars up a 4.17% grade without any problem!
My point is if the WBB loco has only a single can motor (properly geared), it would have more than prototypical pulling power and there would be plenty of room for TMCC and sound. And, even if it does have two motors, when the WBB electronics are removed there should plenty of room for ERR components.
Perhaps we are making much to do over nothing?
jackson