Pilots often ask me why I go on oxygen at 12,000'. Well, with the EDS, there are no weight considerations, so I always have it on board. Clear thinking is easily worth another 10% in performance even at the "low altitude" of 12,000'. And I'm a performance oriented kind of guy, so the decision is clear. Why fly with your brain operating on 6 or 7 cylinders when you can have all 8 banging along?
Jon Johansen flew his custom-built RV-4 from Vans Aircraft overseas from Australia to the USA a few times now. The trans-oceanic flights are made well over 10,000 ft for best aircraft performance. For Jon's best performance, he relys on his EDS (pulse-demand) system from Mountain High.
Dave Sharpflys his ATOS very well winning many competitions.
That's because while at high altitudes, he flys with oxygen. And doing so gets real easy with his EDS-011 oxygen system with the new small, compact & very light-weight micro-lite valve & regulator system from Mountain High.
Dave Sharp high over Sandia Peak in his ATOS