I've barked mine a couple times on accident, it's still going strong. Before I got the wastegate dialed in, I took it to 50psi once too. If you can figure out how to shoe horn a 68mm turbine in that little 9cm housing, let me know. I'm not sure you could even fit a 65 in there. If there's something between a 58 and 65, you might make it work, like if there was such a thing as a 61mm turbine but I've never heard of that.