Instaprints > Dr. Scholl's. Best $100 you'll ever freakin' spend.
Just pay for the boot work for Jah's sake. If you go to a reputable shop (In VT I always go to the Boot Pro at Okemo) they will only charge you ONCE per spot fix no matter how many readjustments you'll need. Last one didn't quite do it? No problem, they'll get you there at no charge. Also if you guy a boot from them, you get all custom work for free.
Lots of shops are like that, you just have to work with a legit place that cares about customer service as much as turning a profit.
Besides, you know the difference between a PU shell, A Pebax and a PE and are you familiar with the differences in how to heat and stretch them without cracking it too? There are a ton of new plastics out now and each have a proper work recipe, so I trust the professionals to handle my high end gear- and it doesn't even cost much. After all, that's what they're there for!
Get the hell out.
Oh fuck off. For what you get out of it, boot fitting is some of the best goddam money you'll spend. More than your matching limited-edition LINE poles, more than your fucking designer SUPREME neck tube, more than even that third tall teel for under your 3X Level 1 or even the five pairs of goggles most kids around here have floating around in their closets while their wrong-size Full Tilts are giving them unbearable shinbang.
See where I'm going with this?
People waste- yes WASTE- money on skiing all the time buying stupid shit because they think it's cool. Boot fitting however, is an investment like few other things could ever be considered. Hell, even the gapers you speak of that ski 2x a year are smarter than you- if I'm gonna ski twice, I'm gonna fuckin' do it in properly fitting boots. Nahmeen? Boots are the foundation of your skiing. You know how many motherfuckers here buy boots absolute last??? A lot. Yep. Buy six tall T's, three pairs of goggles, SWAGGED the fuck out gear head to toe... Oh yeah I forgot boots.
That's why I told OP to suck it. If you're going to spend money ANYWHERE, do it on your boots.