Long crank pins

[nkp_174]

I think these show it better:

Here's the main axle while being modified:


Essentially, I eliminated the old crank pins because they were way too large for scale rods to sit on them. I was going to use the screws as crank pins...as they are around the correct size...but they aren't long enough for the main crank pins.


I've also considered using tubing, but I don't know of a way to cut threads into the outside. Perhaps the solution is to drill out the holes in the driver centers, insert brass tubing, and then add new screws to the outside, much as you've done.