Also I think I could improve some cases. But that will not be worth it, if I don't start seriously practicing again. I should definitely practicing more, because I love to learn new Skewb Algs.
I did also a mean of 12.
My hoya cross isn't really Move efficient.
F4C: 22;23;24;21;22;23;20;21;22;24;24;21 =22.33
Hoya Cross: 47;29;36;28;29;26;28;26;29;25;36;31 =30.16
L2C: 7;10;10;8;12;8;5;6;9;10;9;9 =8.58
Total: 61.08
Maybe they are a little bit slower... All splits are not 100% correct. Just watch often on the Timer, while solving :D
Edit: after watching some of my solves I can say 4 seconds :'D