No Probs! I guess you've only modified one side of the fin so if you do score some new grubs then you should be able to swap the fin to the opposite box and be able to use the unmodified side of the fin?
If you are looking at experimenting with fins then try running larger main fins and smaller front fins in sideshore setting. I'm running 14cm/9cm on my 74 and like it a lot. It seems to be a good setup if you find yourself sailing overpowered in choppy conditions. K4 are cheap and the flex seems to work well.