Outriggers.
I didn't have a 1/8" saw (not sure if it exists). I used a 3/32 and made two passes.
Each slot took something like 50 runs in +X and 50 runs back before moving Y 0.01.
Arms got a workout.
Pretty happy. I've always had problems with Z and slitting saws but these came out 1/8 or maybe a thou short. No problem.
Frames don't fit yet but they haven't been finished.
A couple of learnings...
1) I still think it would have been better to have the bulk of the clamps on the far side to take more of the cutting force.
2) The ends aren't completely square. My suspicion is that with one C-clamp against it, the clamp may have acted as a pivot and when the mill hit the top, the bottom of the part shifted. Not a problem since the frames are aluminum, will flex a little, and it won't be noticeable.
I know this isn't real exciting to many. But right now I'm learning/relearning my machines in preparation for the harder stuff.
I'll probably do the round spacers next and see how it all goes together.
After that, I'm considering the cylinders and covers. They concern me the most. I haven't done that well with cylinders and pistons.
Thanks for looking. I appreciate the patience.
Sorry...no song tonight. I'm still stuck on Rawhide and 16-Tons. Those and "Wouldn't it be loverly" for whatever reason.