After revisions to the steering assembly, and more practice getting used to it, I found a steeper and longer hill to try some higher speeds. The first test was mainly to observe speed obtained and distance traveled.
1st run, #11 (30°/3.5") -- Top speed indicated was 21 mph, about 50% more than previously.
2nd run, #11 (30°/3.5") -- Easy turns, easy return, nice at speed, easy but no drop.
3rd run, #8 (20°/3.5") -- Easy turns but not as confident, not as so willing to turn, but zero feedback, all light and easy, but odd.
4th run, #4 (10.8°/2") -- Very easy, too skittish, spooky feeling
5th run, #5 (18.4°/3.5") -- Very similar to combo #8, easy turns but does not have confidence felt with #11 at the start.
6th run, #6 (25.4°/5") -- Used combo #6, felt OK, easy to dive and easy return, OK.
A rapidly approaching thunderstorm forced an early end to this test session.