For those interested in the Go .28:

I pitted for a guy this Sunday who was running a newly broken in motor in a Cen truggy. He ran a 7mm restrictor and a 12t bell. He was doing a great job for only his 6th race!

His run time really impressed me- I had him come in at 7:30 mins and he then ran another 8 mins before running out of fuel just after then end of a 15 minute A-Main. Quite impressive for a .28 IMO.