Nice! Make a 3x3x7 tutorial please, or at least a method overview. I take like 15 min for that thing
1st step: Orient all piece, mainly just solve cross (only orientation, you can use every white and every yellow edge), F2L and OLL.
2nd step: Connect the white pieces. My cube orientation: white center left, yellow right. On the yellow side I connect a corner, then put it with U2 onto the white side (anywhere, not necessarily the right place), and the next 3 corners the same way. Then connect the white edges and put them in the correct spot.
3rd step: Solve all except PLL. The white cross is done already, so just solve the 4 F2L-pairs and do the OLL-alg.
4th step: Solve the yellow corners. This is a fast step. I will call this a block, if there are 2 matching corners (colors) on one layer. It's not a block if all corners match. If every layer is in this block format, just bring all 3 blocks into the back and do: R' F R' B2 R F' R' B2 R2 (A-perm). This will solve all corners. If there are other formats, just bring the blocks onto the left side and do the alg. Now you'll get the first case.
5 step: Solve edges. This is a very intuitive part. Normally I do a U-Perm and solve the rest with Commutators. Sometime I also use the H-Perm, this alg can be applied to only one or two layers also.
As for the cards, why did you sort them into separate piles instead of just one?
I memorize the cards along a route. If I forget the cards on one location, I start a new pile. When I remember the cards again, I close the gap.
sub2!
Very nice. What next? 1000 digits and 10 decks in one hour?
Thanks, I guess I can do these with a bit of practice, but I doubt that I'll try it. I want to start practicing multi again this summer, so you will get some rivals. And this requires a lot of preparation, because I'm changing my letter-pair list to a topic-picture-list.