Hi Eddy, thanks for the welcome.

I am not an original Essex boy so say anything you want. LOL

My fist one was fixed gantry and moving bed and wanted to make this one the same, hopefully it'll work just as good. I've ordered complete linear bearings and supported rods sets for all axes so hopefully it'll be easier to make this time.

Would the lack of air circulation not be a problem for the spindle and the steppers?

I'll try and find the threads you mentioned.