F’ (D R’ F’)
(R) L2 D2 L U2 L // 4b2 2e (10)
R2 F2 U’ B2 * D’
R’ L F2 R L’ // 2e + slice (20-2)

* = B2 U2 F2 U2 B2 D2 (6-4)

I didn't know about JZP, HTR equivalence and other slice stuff back then but essentially my solution is easily rewritable to 19 by slicing L2 D2 L U2 L R2 sequence which is kind of sad concidering I would never let this happen nowadays lol