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• B2 F' U'
B2 U2 B' U2 F2 R2 B' R2
D2 U2 R' U D' F
U2 R L B2 R' 22 moves

Over 1hr limit I found these:
B2 F' U'
F2 D2 U2 R' U D' F
U2 L' F2 R2 U2 R' U2 F2 L2 B2 R' 21 moves

Finally:
B2 F' U'
B2 R2 L' U D' B'
F2 U2 R' U2 R2 B2 L' D2 R2 B2 R' 20 moves
I found the same 8-move start :)

1st attempt:
B2 F' U' orient corners,
seems promising the following continuation:
B2 L D U' F' domino reduction,
U2 L' U2 L2 F2 L' F2 U2 R L B2 L' permute corners, leaving 4 edges and 2 centres,

In the next attempts I try to find L-R centres swap efficiently:
B2 F' U'
F2 D2 U2 R' U D' F
U2 L R2 B2 R2 D2 R' D2 B2 R2 B2 R' 22 moves
Hi,
here is an interest scramble for CF method:

Exeter Open 2016
D R F' D' L2 B2 L' D F2 B U2 B' U2 L2 B U2 B2 D2 R2

1 move to orient corners,
2 moves to orient corners on each faces,
I found more 22-move solution within 1hr, and then 21.
If you find something fo this, post here pls
Good luck :)
porkynator
Yes, very nice scramble! I did this in 30 minutes:

F' B2 U' //Orient corners
B2 L D U' F //Orient edges (very lucky for me)
then switch to inverse scramble
R' * F2 R2 //Separate corners
D2 L B2 L2 D2 L D2 //All but 3 edges
D2 F2 U2 L F2 D2 B2 R //Last 3 edges, 2 moves cancel
But then I used * = U2 F' B L2 B' F to solve the last 3 edges and saved 1 move.
porkynator
Solution: F' B2 U' B2 L D U' F D2 L' D2 L2 B2 L' D2 R2 F B L2 B' F U2 R (23 HTM)

What are your solutions?