Did some PCT last night and fired up a G30 on FICS. Crafty has illuminated the error of my 34th move. Really obvious that I missed it in hindsight. I wouldn't have figured the whole line, I don't think, but that one move should have stood out to me.
I'm not sure where I could have done better in the middlegame. Crafty saw no tactical chances missed.
Crafty at move 34: 34. ... Kc4 35. a3 Kb3 36. Kd3 Kxa3 37. Kc3 Ka4 38. d5 a5 39. bxa5 Kxa5
I never feared for my King, really. My pieces had a good hold on the center and I was comfortable pushing his dark Bishop when I did. I feel like I might have missed something with either my dark Bishop finding a check on f2 and/or the knight that eventually took his Bishop on g3 finding a fork.