I made a brass lever to stop the lower edge of the blade from moving around. I decided to solder in some pins so I could adjust the diameter of the cut. Adjust the cutter position, then slide the lever to engage the pin to lock it into place.
This helped by stabilizing the lower part of the blade holder, but then I discovered the the top guides, the ones that slide to and fro were a lot more sloppy/wiggly than I thought.
I took the black plastic part off, drilled out the holes to accept brass tubing. The tubing made super close bushings that now slide over the two steel rails with zero slip. I used JB Weld to hold the brass bushings in place.
This helped by stabilizing the lower part of the blade holder, but then I discovered the the top guides, the ones that slide to and fro were a lot more sloppy/wiggly than I thought.
I took the black plastic part off, drilled out the holes to accept brass tubing. The tubing made super close bushings that now slide over the two steel rails with zero slip. I used JB Weld to hold the brass bushings in place.