I think I know the answer, but I'll ask for advice. I picked up a combi bbw/coti off ebay for a cheap price, but when it got here today I noticed that is dished on the coti side enough that it is almost all the way down to the BBW and it follows a corkscrew slope. The BBW side is still pretty thick, do I bite the bullet and flatten it out, hoping I can get a little use out of the coti side?