I've just done this. David helped with me understanding which cells to change. I got the 1000w atu from Aliexpress. They soldered in the chip, and blew the read fuse.

I would suggest you cut the pins, and remove one pin at a time. Then install a socket, and a new chip. That cost me less than ?4. Thr programming was daunting for me, but got a pickit3, and watched a few YouTube videos.? It wasn't that hard, but just make sure you correctly connect the cable to the pickit pins and the pcb. CHECK the pin designations to make sure you got that bit right.

I must have reprogrammed my new chip 6 or 7 times before I was happy.?

Download and read the atu documentation, especially the bit at the end of the doc.

It might appear daunting, but it's not that bad.

I also don't understand why they blow the read fuse on publicly available software.

Take care, and have fun.

Geoff

G0DDX?