I'm almost exclusively a 6max NL cash game player, but will occasionally play this tournament when I earn enough points to freeroll (entry is $150+12)

1st=25k
2nd=17.5k
3rd=12.5k

3 handed 20k-40k with 5k ante
BB 31bb (hero)
SB 35bb
BTN 36bb

SB is a good player who has a 3B of 18%. I recently lost a flip with 88 vs his AJo BVB and then doubled up when I got it in with AK vs his A8 (I was short). The BTN is a recreational player who has a vpip/PFR around 33/16.

BTN min opens to 80k, SB 3B to 220k and I decide to 4B jam 1.2 million with A9o as a bluff. Villain tanks and calls with TT. At the time I felt that it was a good shove, based on his 3betting tendencies and the fact that he should be attacking the BTN. I still feel good about my play, but would like to hear what experts and/or people with ICMizer have to say. Thanks!