I could never replicate Alumina's starting strat, so I went with my own more consistent one. Never had that much problem with the level except for the ending slope, which I had a hard time understanding how to do correctly. Eventually I beat Alumina with a 12.550 and decided to continue, and 5 minutes later I got this run!

Feels good to beat the previous record by this big amount, and getting a sub 12 run! :)