Ok, here is the best answer anyone could give you.
Check out this thread, http://www.snowboardingforum.com/eas...nd-tun-up.html
& Sign up.
Sportchek will send you 30 base grinds, full tune-ups, even core shots.
You could put it through the Pepsi challenge.
Do each of them separate just to see.
I've all ready signed up twice, I just need to make up some more email addresses.