Enough 4th axis silliness

It's clear that thee are going to be a few problemettes with 4th axis:

• I can get indexing to work but not true simultaneous (concurrent) 4 axis (3+1) operation:
• There seems to be a problem with the post processor. It's arguable that it would be possible to fix it, given that the post processor is completely open and written in Javascript. However, unless I was about to spend several months in prison, I'm not going to have the time to devote to fixing it.
• The Fusion 360 CAM appears to be "work in progress". Not much I could do about this other than wait for them to get it finished and stable
• The Newker 990MDc controller seems to have feed rate issues and insurmountable Chinglish barriers (documentation and support). I suspect it's just going to be sensible to expect it to work.
• Besides, I don't have any pressing need for it in the forseeable future. 
• So I will set it aside for now and focus on something a bit more sensible and practical, like making some stuff.

So - off with the 4th axis (rotab, driver, PSU, control cable etc).