Just an fyi, a Road Rebel (32) might be a bit much for the Rotax and Mojo’s, unless you’re carrying a lot of weight.
Even the Masters guys tend to run the KT1 (30) or Blackstar (30/32), if they’re on CRG. I personally weigh between 190-200 at racing weight, and run a 30mm Italkart Rapido V. The only 32mm karts I tend to see in Rotax are the OTK karts in Masters at the heavier weights.
Would guess that weight would hurt you more if you’re sprint opposed to road racing. We run seniors with masters in our road race series. Standing starts hurt the masters’ guys, but once they’re away, and it could be to their skills, they can the run competive times against the seniors.