Honest answer - nothing, I'm afraid.
Storeboughts cannot be adjusted. The most you can hope is to make them smoother with lube - something you've already done. As for lockups and pops... I'm sorry. That's one of the reason that pro-cubers don't use storeboughts. They usually go with one of the DIY cubes out there.
Rubiks.com do sell DIYs, but I can't comment on how good they are as all the rubiks 3x3s I own are storeboughts and all the DIYs are other brands. Not a matter of preference, it's just gone that way.
Please take off topic discussion off this forum. Thanks.