Buzzz Vs Roc

This is a sketch for a disc golf stamp for a tournament some friends are putting together. It will be a Discraft Buzzz Vs. Innova Roc tournament, and I've included the actual stamps from each disc for those not familiar. I'm thinking tournament info around the whole thing in a circle to fit the disc nicely. What are your thoughts? Final artwork will be full color, vector. Large image of sketch attached.