I played around in TinkerCad over the holidays. Here are a couple files you can 3D print to create bore cover to keep dirt out of your case while assembling/building it. I created covers for the cylinder and pushrod tube bores.
I tried to optimize them a bit for a faster print. I prefer to print them in PETG as it is more durable than PLA.
Note: Every printer is a bit different and calibration my be off. If it does not fit correctly try using a minor scale adjustment in your slicer
John Montgomery
I tweaked the STL files to be fast printing, but still reasonably robust. I also fixed the pushrod tube covers to fit better
on Wednesday