I didn't buy them, yet, his advice made me do more research. He doesn't have any 1st hand experience so that why im posting. I've read some people getting 5 out of 10 machines bad and other saying they been running their machines for couple years and fine.... SO, yeah it is a risk.
That is why im asking is there things to do to reduce the risk? PSU, FAN, HEATSINK, turn it on its side, idk just what i read......

As for working on them, there is nothing i cant do in my mind. Been working on computers and taking apart anything and everything and putting back together since the 80's as a kid, coding, building, repairing and replacing chips on pcb, etc.... and i already make enough money not to work, so if the information is out there, have all the time to figure it out...

If i had 2 s17 overclocked i would make back my investment in about 2 months, i have free power. So, that is very alluring, but 30% failure rate is very off putting. still undecided....