I might as well throw out a 1-year update!
1) Sidemount is going great! Still haven't taken any classes, except online sidemounting.com materials.
2) I'm not as fast getting in the water as my friend who has been diving 22-years, but probably fairly average compared to most backmount divers. Jale's idea (scroll up a few posts) for putting bolt-snaps on a cord has been a massive game-changer for donning equipment quickly.
3) I still often dive with an AL80 + AL19, although occasionally 2x AL80s. The offset sizes don't bother me at all. That said, I don't expect the AL19 will work with #4 below
4) I just bought a matching pair of Steel 100s! As a bonus, I didn't have to sell any ammo to buy them. Killer deal: $100/each, 2019 hydro, 2004 birthdate, full 3500PSI. I haven't taken them into the water yet, but may post and update once I do.
(I don't expect to be doing Steel 100 left + AL19 right, I already tried that once and it sucked. Unless I add weights to the AL19).
5) I still suck at and need to work on frog-kick.
View attachment 730199