VGN 2-10-10-2 - my 2014 challenge

[Sumpter250]

Both motors will mounted and fixed into the boiler and also the front motor will not rotate.

I still see some potential problems, unless you split the boiler horizontally at the running board. Otherwise, you would need an opening in the bottom of the forward section of the boiler big enough to pass the motor and mount in and out -- another big compromise. And how do you install the rubber band and get everything clear of the hinge between the units?
Now, you could treat the whole thing as basically a ship in a bottle and pass the whole assembly through the firebox in some way -- if you do, it will be most impressive. However, just the task of disassembling, painting, and reassembling an articulated and getting it all to work again (which I've done now and then) the way the manufacturer did it is trouble enough for me, especially given everything else you have to do. I'll be most impressed when I see this.

jwb, when you have some time to browse, check this out: http://bigbluetrains.com/forum/viewtopic...=37&t=6394
The motor resides in the tender. I had to build a "sled" for the motor, and insert guides in the tender's water tank, so the motor would remain in alignment. A single screw, through the bottom of the tank, holds the "sled" in place. Cup and Ball universals, will couple the motor to the gear boxes ( still not received ) .
The "motor sled idea" might be an option for the 2-10-10-2 "conversion".