3018 CNC bed extension

Hi everyone.

I designed this extension when I upgraded my Sainsmart Genmitsu 3018 PRO-Ver with the 3040 extension kit.

I typically use 4 of them. They allow to stabilize sheets of acrylic and wood I use for my projects, which are larger than the 3018 bed. I actually think they could also be useful to standard 3018.

I included M6 threads in the model but they may require manual tapping after printing.

Please note that this version is designed to be used with a 12mm spoil board, which corresponds to my personnal typical use scenario. I might include a plain 15mm thick version later-on.

As usual comments and suggestions welcome. I will do my best to upgrade this based on your inputs.

Best.

Le Gluon