I also found an FPG setup, which goes like this:

Frames are based on being E into 6-2

Do a full jump on frame 216 from on top of the row of bricks above the big pit before the two pipes with piranhas kinda near the end of the level. D+R off the platform you land on, and you get F7 flashing and get D70 if you do topstep. You get like 14 frames to spare, so SlowPG is not a problem.

walljump? don't you hit the coinblock?