Fellas, the drive shaft used to repair the CCII Niagaras are different than what is used for the articulated locomotives. The Niagara uses a “fixed” driveshaft, not a slip yolk constant velocity shaft. If you look at the shafts described here, they have the ability to slip in & out, in velocity. The Niagara’s design uses a floating gear box design that literally uses the flywheel’s nub to hold it in parallel, ……clear as mud right?…so, in other terms, if you used a slip yolk CV style shaft, nothing would hold the gearbox from teetering back & forth. Hopefully, Pete @Norton sees this and shows the shaft arrangement he uses on the Niagaras,……..on my own CCII Niagara, I didn’t like the stock arrangement one bit, and completely redesigned the motor mount, and the gear box mount, along with setting up a limiter for the gear box travel. This allowed me to use a conventional dog bone & coupler arrangement, like we’re used to seeing on scale steam….
Pat 
