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Re: Thoughts on the new AM14U 2014 KOP Drive train?
My two gripes about the C-Base were inability to direct drive easily and too big of a spacing between the inner and outer rails. AM14U takes care of both issues nicely. Compared to C-Base or Drive in a Day, AM14U puts the wheels farther to the sides. The wheels can be within 3/8" of the frame perimeter's edge if you really want to push it. I really like the little flange on the bottom of the outer rail - it gives some bending resistance without forcing the wheels way inside the frame perimeter.
At first I was a little weirded out by using standoffs to connect the outer rails. But upon reflection I'm cool with that design choice. It's also possible to put 1/2" OD x 3/8" ID tube around the dead axles and run 1/2" bearings in the outer wheels to stiffen up the sides a little bit more.
I agree that a flange across the top of the inner rails would be nice.
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