I never think to look where people live. If he is down on compression at that altitude he may very well be able to go as high as 40 total. Just have to keep on to of the tune up so if somehow he gets to mineshaft air it don't eat itself to death.
That's good advice, I trhink. I didn't notice the altitude where he lives, but, looked it up and it's nearly 5,000 feet. I gave advice based on a sea-level operation, and, I agree, he needs more... probably, lots more....
