I have been thinking I haven't heard about your adventures lately, only to come and look to realize I have missed since January till now.
In the 3 local events plus the Vegas Tour, I have been playing with the RT660s, as well as the Shift to 3rd.
RT660 seem to be working well and holding up well, but they need more pressure then the RE71s.
The Shift to 3rd... At a local event at an old airport runway, we had LONG sections of cross over/transition/slalom. First run out I bounced off the limiter at the cross over. So run 2 I did the upshift right when I was lifting to rotate to take the cross over. Because the rest of the way out was no heavy acceleration just maintenance throttle It REALLY helped me pick up the pace. Then was able to downshift to 2nd at the turn back at the end of the straightaway. Of course the 1st time I tried it, I blew the new cone because i was carrying so much more speed, but the 3rd run was great, and got me the class win. At the end of fun runs (we only count the first 3 for competition like a Tour race), I was up a full second over what my winning time was.
Vegas day 2 had a point I was hitting the limiter, so I went for it run 3, same thing was carrying so much speed I blew the next corner, but even with that I was still almost 1/2 second faster. But I did have to go back to 2nd almost immediately.