Thanks for the updates, very useful to have this sort of firsthand review.
Question... what are the available height ranges for the Powerup flail mower?
If we got one, I would use it for topping for livestock, so would want a high cut, just taking off the seedheads on our meadows; for managing rushes, so again a higher cut is probably best, at least at first with very well-established bushes; and our tourism businesses would want a lower cut for the camping field and holiday cabins lawns. (They have a super-duper ride on they use at the mo, which won't cut high enough for me, but when that eventually wears out I expect they would switch to the towable if I have one by then.)
Also, what is the cut stuff like? For me, leaving the cut stuff relatively intact is fine, the animals love to eat cut nettles and thistles and it means none of the grass cut off gets wasted. But the tourism businesses want a very fine mulch so they don't have to worry about raking up afterwards. (Which is why we didn't try to get one thing that worked for us both already.)