Regarding the slow rolling, I think that it might be ok. I have never flown a hangglider, but I fly a paraglider, so I occasionally fly with some hanggliders. I think that the hanggliders that I have flown with had where more beginner-friendly ones. That means that they have a way smaller wingspan, which probably means that they're easier to roll (that seems intuitive to me, but I don't know if that intuition transfers to reality ). Also, beginner hanggliders are lighter than other ones (since pro hanggliders have a solid leading edge, as opposed to just tubes and fabric), meaning that the pilot-to-glider ratio is higher, so when the pilot moves, it has more impact on the center of gravity of the whole system.
Anyway, I will try to tweak the masses a little bit, to adjust the pilot-to-glider ratio, and see if that changes something. Regarding the horizontal position of the center of gravity, I will keep adjusting it until it feels stable.
I am happy to read your post larrylynx , and to see that I am not the only one having a hard time understanding TMD files (even though I have some solid geometry and math background). Maybe there should be a course "MA-101 - writing TMD files" at university .
I will keep you updated about the progress that I managed to make, but don't be disappointed if it isn't soon, because I am very busy at university right now .