I tried Braiins 8-10 months ago, and Braiins seems to have fried 2 of my hashboards (1 in each of 2 S17 Pro units) during the initial tune.
Machines had run fine for over a year and a half, and on first run of each machine, killed a board on each.
One I was able to get back for a short term by re-attaching heatsink that shifted (moved but did not fall off)
So they appear to tune from a high power down initially rather than up I assume, resulting in an overheat? This is a guess as I did not research further.
I don't know, just abandoned after it killed two boards.
1 may have been a fluke but 2 is more than that.
Again this was about 8-10 months ago.