I was at the Novak race a couple weeks ago and they allowed open speedo's in the 13.5 12th class. The Tekin with 203 software was the flavor of the weekend. There were a few guys in the A with BD's and they had no advantage on a 100' straight with a sweeper on the end. There were a few Mamba's as well and I was pretty impressed for the $130 price tag.
I ran the SPX in 13.5 12th, and it was like draggin an anchor down the straight compared to the tekin controlled cars. I had to drive the wheels off to make the top of the B.
Andrew sets up some knarly tight courses here at MMR in the cities, and it has helped take away some of the difference as we really never get to sustain full throttle for any amount of time.
See you in a couple weeks.