Hallo Astroman, this is Astrofriend talking to you!
I bought the Kossel delta linear plus. I had a lot of problem to understand how to set it up. Now with the new software it should be a lot easier.
Here are some details how I did it:
http://www.astrofriend.eu/3d-printin...ter-setup.html
Now I can't live without my 3D-printer. Not only astronomy, my car also needs spare parts.
I don't think a massive without holes will be better. Only plastic where it's needed, the outer rim. I noticed that the bottom got warped, mostly because I changed material, with PLA it never behaive liked that.
I will be back with a report when I have used it for a couple of months, but summer now and can't do any more astronomy until the winter is back.
/Lars