the whining was fun.
.....personal endorcements, not so much.
but even most hard-core, 'dyed in the wool' champions of the consumer would first seek compensation from the vendor/shop owner to rectify the matter.
go back to the shop you bought it from and ask them to correct it.
50/50 they will make it right.
i'm assuming the boxes are intalled correctly. i.e. flush, square and pointing in the right direction.
no doubt, all fin boxes including yours, are injection molded.
good, fast, cheap. but the part to part tolerancing is never enough to get a good fit .
i'm sure any technician with moderate skills would deliver an good fitting assembly.
at this point, bitching to us and doing your own fit does not sound particulary effective.
worst case, the over-priced board you purchased needs only $20 worth of labor to meet your expectations.
if the shop or manufacturer is not helpful, by all means come back and trash them some more.
so far, your complaint sounds logical.
-you've done your 'due diligence' by confirming the fins wobble.
-you've been unsuccessful in fixing the problem yourself.
-you've observed that wobbly fins will potentially cause you to lose a fin ( or worse, damage the box, the laminate and create internal leaks)
if you continue to use your new stick in its defective condition, while knowing the potential concequences, who is really at fault?
Board that costs over $ 1,000 new and fins are all wobbly due to poor construction, but money and time is wasted on graphics etc etc...
any chance that the board was not purchased 'new' by you?
that would change things some.