Ok quick question i have an idea for making a brush and have ordered a 30mm knot from TGN. I have no woodworking skills or tools, but i plan on putting the knot in another item (surprise dont know if its done yet...) i saw a brush earlier that was done in a Wrench socket and it looked pretty awesome. Iam wondering if i need to have the diamater of the hole iam putting it in as EXACTLY 30mm or can there be a gap that i can just fill with epoxy?