Perhaps not, but is a 90% chance sub28 better than a 25% chance sub28? Of course it is. A little strategy, and a calm demeanour could go a very long way in FMC. I will try this algorithm now, although I don't expect to do any good.
I don't understand what you mean here.
If I have an hour I can get a sub 40 at least 90% of the time with triple checking, but if I do that I will reduce my chances of getting a sub 28 a lot.
If I try to get a sub 28 in that one hour that means I take a lot of risk by spending extra time on getting a really good 2x2x3-block (7 moves or less with a good continuation). That might mean that I find a 15 move F2L that took 45 minutes so chances on a sub 28 are there, but chances on a DNF are also there. I would rather DNF 75% and break the WR the 4th time then get between 30 and 40 moves every time.
Finally if you want tips on getting a double X-Cross you can either:
* Stop trying to find double X-crosses and focus on 2x2x3+1 final cross-piece
* Analyze this almost regular Fridrich start (2008-05):
Scramble = R2 D2 R2 B' D L' R U' L B2 R2 B' D F R' B D F
x-cross + prepare pair: F2 D2 B D' L U2
double x-cross + prepare last pairs: D B D B2 L' B D'
insert last pairs: B D2 R' D R D' B'
I wanted to see how far I could get with a "regular" Fridrich solve. I added just a couple of moves (4th move D', 7th move D, 10-12 B2 L' B instead of B' L') that prepare the next pairs.
.
)-
