Today I officially crossed the point of no return with this build. I modified the levers that move the valve rods in and out and connect to the valve gear.
the existing part looks like an after though as it is a solid piece with a reduced diameter on the end and a flat to engage the other lever.
it was fastened to the frame by a u shaped piece with one screw to hold it all in place. given the mods I am about to make to the frame,
accommodating these pieces as is didn’t work. so I found some brass rod of .114 dia. and flied the flat on one end to accommodate the mating flat on the lever.
I then chucked up the round end of these pieces and drilled out .116 dia. for the new shaft.
then using the Dremel cut off wheel cut as close to the lever as possible and cleaned up with a file.
I then silver soldered to the brass shaft, making sure I had the correct alignment. when all was done I assembled several pieces of the Bachmann engine onto my proof of principal frames.
these greenish blue pieces shown in the photo, are the replacement frame sections that will eventually be either 3d printed in metal or CNC milled.
jury is still out on this while I await the next batch of parts from Shapeways. those results will be reported in the technical modeling thread on 3d printing metal
this week I plan to start milling out the frame to accept these pieces. also of note is the new positions for driver brakes and the tumbler shaft.
while the photo doesn’t look like much it proved out the new locations for parts being reused. end mills just to keep parts somewhat in position.