Omg that would have been the worst feeling ev eating skii wax! How did it taste btw? Hopefully you'll recover and your skii will too
OMG, you've obviously
NEVER eaten Lutefisk, or ski wax.

The ski wax would win the taste test by default. Now, Lutefisk as a ski wax substitute as oppossed to edible food?.....Go try some Lutefisk, I'm sure you'll figure it out halfway through the first "round trip" bite".

OK! Lets talk front and side aerials, and whether or not a side somi can be created by converting either of, or parts of their motions. The problem you're having in "crumbling" on the landing is probably the result of trying to convert a side aerial into a side somi. I don't think you're going to get it to work by doing it that way.
Most of the problems I see in side somi's is the lunge into the skill, if done like a side aerial, is to deep to recover from into a push-off that creates lift and air time. There's a better way to work on the entry part of the skill. Try moving down the beam with more speed than you would use for a side aerial, place what will become your kick leg on the beam and pass over it with as much forward momentum as you can. Move onto your "push off" foot and stab/punch the beam for a take off that has a bit of a "blocking" action. The stab/punch/block will give you height and it will add to whatever rotation you can get out of your kick leg.
So about the kick leg. Get it going as early and fast as you can. The harder you kick it, the more energy your rotation will have, and if you kick it straight up behind you, it will direct all of your energy straight over the stab foot....you'll stay centered over the beam, you'll have height and rotation! The next thing to be aware of is making sure you feel the weight leave your push off foot to start your turn and tuck motion. The motto here is.....Later makes it straighter!
I wouldn't just go diving into this new take-off with-out working up to it. My advice is to do about 100 good side somi's off the end of a floor beam onto a safety mat with a line drawn on it to similate the beam. After that you should start each beam work-out with about 10 off the end to remind yourself how to do the take off. Work like that for at least 5 practice sessions. If you feel things are starting to go bad...return back to the 10 at the start of each beam work-out. This remedy of going back to 10 at the start of beam work-outs is a lot like the directions on a bottle of mouth wash...
USE AS NEEDED and sooner is better than later.
