[Jacck]

1. in-limit=31
(F' U2 R L' B') // 5/5 222
(B U2 B' U) // 4-2/7 223-1C
(U F U2 R2 U') // 5-1/11 EO
(F2 R2 F' R' F' R) // 6/17 L5C (found after 8 min )
ssf: R' F R F R2 F2 U' R2 U2 F' U2 B U2 L R' * U2 F #
* L' F2 L B' L' F2 L B // 8-2/23
# B2 U F' U' B2 U F U' // 8/31 
solution: R' F R F R2 F2 U' R2 U2 F' U2 B U2 R' F2 L B' L' F2 L B U2 F B2 U F' U' B2 U F U'
Looked for other first-insertions and tried a few, but oversaw two possible -1-insertions after 3rd move which lead to 30, but that seemed to best for IF. Disappointing, thought this would end sub30