Techxy P702M - plexiglass frame - story: someone purchased it as a kit, never got it to work and passed it on/sold it to someone who knew what they were doing (something about parts installed backwards, upside down, mis-wired) - got it working - well going through the motions - sans filament. Put on Craigslist and along I came. Good price and it has a new home - some tweeking and a couple of hours later a perfect box for my ESP32-cam. I don't think a multi thousand dollar printer could have done a much better job.

I have discovered one thing - the plate seems to be concave. 1 or 2/1000 .001 or .002 (3?) A good straight edge show light at the center.. If I use a strip of paper under the extruder near the 4 corners, my prints tend not to stick to the blue tape. However when I do the paper strip in the center - extruder drags at the corners - my print sticks, and I mean sticks!

I'm thinking placing a sheet of glass over the existing plate with a ?2"? square of blue tape under the glass(support). Thoughts.
Thanks