I'm slowly getting my toys together.
I've been shopping around for a cheap CNC 3020 milling machine.
It's been a HUGE step up for me going from working with wood to 3D printing and plastics.
I was going to build a prototype head mount using PLA (I think the hot end mount doesn't get too hot for PLA).
However, it is low on my list. I have a couple of other projects ahead of it.
My 2 cents: Even the existing system fails to detect filament flow issues.
I've had a print run for hours with no filament at all making it out the hot end.
Worse: it can falsely detects filament feed errors and abort the print.
A more reliable filament feed system would virtually eliminate the problem.
If it does fail, the worst you get is no filament - it will ruin the build but not the printer.