DBXL 2.0 Gearing question

I bought a used roller a few years ago. I put a 1100kv 6 pole motor with Max 5 in it. A 17t pinion and stock spur.

Finally ran it last Saturday and it cogged pretty good. Ive never been a gear expert, Im figuring i need to go down a gear or so, but I love the speed it was hitting after cogging was done. Anybody have any ideas how I can keep speed and kill the cog?

Only reducing gearing will help with the current setup really....maybe adjusting the punch up could possibly help Other than that, going sensored reduces it as does adding more volts.