Looks like only a few of us bother with the DT's. I love them and they have helped me understand the physics better than before I started in January, this year. Time trials are so easy now, that I just go for a respectable time and get on with the Drifting.
I'm going to try the M5 and M3 tonight on the Tsukuba DT. I used the SLS and got a little over 14k with it. I'm still not happy with that score. I want at least 20K before I stop doing it.
On Grand Valley, I'm sitting at 12,3xx and while my goal is usually to double the gold score, I feel like I can get much more points out of it. Just having a hard time with consistant scores. Most times I'm in the 10k range with occasional 11K+.