Again, it let all the magic smoke out, and blew up 5 driver chips. Also blew up the model cooling fan. Fortunately I have already bought another set of drivers, and already had a model cooling fan off the last extruder I melted

.
Suspecting the PSU, I wired in an old HPE gen8 PSU I had, which worked well, apart from it was taking forever to heat the extruder, and on fast, high flow prints, was getting runaway protection errors. So I thought I'd better check the original PSU output, which was 24V. No wonder the HPE 12v one was struggling.
So wired 2 HPE PSU's together (well, already had one sorted, as I use 24v to charge RC batteries), and that works fine now.
Ordered a new PSU from the land of Chow Mein.
In addition, I thought it was high time I bought a new printer, so now have a Creality K1 Max. Which means I need to decide what to do with the old Artillery Sidewinder X1 once the new PSU arrives and is fitted....