I did indeed have it running, never really got to grips with the track though and think it's possible I've tweaked something somewhere. Ran the 501 at times in practice and in one heat too and would say the 511 definitely has more grip and bite! I struggled for balance on it though and on jumps, but last week felt the balance/jumps were better, hence confused!!
Don't think bulkheads crossfit as the 511 bulkheads have more chassis locators!