Since January I’ve put in nearly 1070 freewheel miles, mostly on trails. My latest focus has been pump tracks but I’ve also recently starting doing road rides in the neighborhood of 20 miles at 8mph on a 26" wheel and I want to work to push that up to 10-12mph. I’m not comfortable going faster than I can run out, particulary when I’m coasting. On non bumpy ground my rhythm is pedal fast for a short time then coast until my speed decreases sufficiently then repeat. I use the break to reduce my speed on descents and occasionally as a balance adjustment (particularly if I’m tired or a car is passing me). I use the brake a lot more on bumpy trails. I still have considerably more UPDs than fixed wheel unicyclists which reduces my average speed. I’m also no physical paragon so the Unicon distance records are safe. I do believe the freewheel will provide an advantage given enough practice; it’s just that advantage is over my own fixed wheel riding which is inconsiderable. A different rider would have a greater advantage. I expect to get experience this year riding a 20" single speed 3.8x geared freewheel unicycle as mentioned in this thread and I would love to give your old 3-speed project a spin with the freewheel modification at some point if it could be arranged somehow.