me: 5' 10" 150 opponent: 5' 11" 220 in GI... i was able to maintain positional control for the most part (had his back, had side, but most time was spent in full mount), however i was having a tough time submitting him. armbar was out of the question for me, i didnt feel like i had a secure base in the S-mount setup. His wrist/forearm was too large to manipulate into a keylock. and i made a mistake setting up the arm triangle, got swept, lost guard in the scramble to him in side control on me, gassed, and got keylocked. in hindsight now... i think maybe i should have attempted: -a cross-arm collar choke from mount -baseball choke from side mount -transitioned to side control as i was setting up that arm triangle. any other favorite ways to submit a much larger opponent from mount/side mount?