Looks like around 15-15.5. The mychron data goes bananas so its hard to tell. But at least 15K.
i can imagine the barrel going red hot like something out of fast and furious
If you have half an ounce of engineering savviness, do the top end yourself it’s a doddle. Every 15 but be sure to inspect it at 10.
You’ll have to make sure to accurately measure the cylinder diameter so you get the correct size of piston.
I’ve had a few X30 engines, don’t need to worry too much, oil at 5%, keep an eye on the water temp and EGT and that’s it.