[Linus F]

This is Rami on Sammy's computer. Here's a quick overview:

2 move to pseudo 2x2 found on normal. Ryan (got 28) also found this, but didn't see much better after it. I switched after these two moves.
6 move 2x2x3
16 moves to AB3C
4 moves cancelled during insertions

Scramble: U2 L' D L2 F U2 F L2 U' R2 D2 F2 U2 L2 B' D2 L2 F R2
Inverse scramble: R2 F' L2 D2 B L2 U2 F2 D2 R2 U L2 F' U2 F' L2 D' L U2

R2 B' // pseudo 2x2x2
switch to inverse (B R2 premove on inverse):
L (preserve pair)
D F L2 // 2x2x3
F2 R' F' R // woah
U F U F' U F // AB3C

skeleton on inverse:
L D F L2 F2 R' F' R U F U F' U F B R2

skeleton on normal scramble: R2 B' F' U' F U' F' U' R' * F R F2 L2 F' D' L'

Insert at *: R U R' D R U' R' D'

final (20): R2 B' F' U' F U' F' R' D R U' R' D' F R F2 L2 F' D' L'