So I had a pair of 15" Soultone Custom Series hats. I got them super cheap used and after about 2 months the bottom (yep, you read that right) cracked. I didn't catch it until it was about 1" long. I cut out the crack with minimal effect to the overall sound but I just wasn't quite happy with them. Being that the repair put their worth at next to nothing I decided to bring them to work and sandblast them (or glassbead rather we call it) with low psi and silica sand. Holy smokes did it make a difference! I did quite a bit (enough to remove all the outer logos and a little more) amd it even seemed to lighten them up a little, which was fine by me. I eneded selling them today for what I originally paid pre-crack. Hoping to get some 16" and do the same now, maybe to a Custom top and pair it with a Natural bottom. I tried to attach a clip I made with my phone but it says I don't have an allowed extension. Not sure what that means. Clip really doesn't do them justice anyhow as I don't have access to any proper audio eqipment.