zool,
Unfortunately you have thrown up a long winded waste of time.
You want to be a smart arse college boy? you have been the typical which doesn't read before ranting.
read the words "carriage design" then look that up. Where does a carriage and a
mortise and tenon joint have similarities? in this case they don't. The question is not on the joining of materials but the methods in which motion is gained on the CARRIAGE.
The carriage, which is pictured; the layout of the bearings, the mounting of the motor, hell even the shaping of the plates is all nearly identical.
Im not getting involved in who designed what as i'm fairly new to all this and find it sad that winegars thread has been used for so much other than HIS machine