The spindle speed control went out on my mill last week

It's a bad repeat of the last time this happened about 4 years ago
https://www.rcgroups.com/forums/show....php?t=1238972

Probably not gonna get away from it cheap this time.
Some of you might have been wondering why I'm selling some choice stuff lately.
No spindle control no CNC mill stuff. No blingeron, no blinghorn, no secret project #7, nothing. Not till I get this fixed.
I feel like IronMan without his suit...
So I'll be scratching my head to solve the problem, and maybe find something else to sell from the shelf of shecret schtuff...