Hi Jeff, You're right, you should have applied some contact cement when you noticed it...with skinnies or Z-Tapers we use this shim, so it doesn't matter:
http://www.surfingsports.com/product.asp?
prod=pwx_rdm_shim ALL booms require some maintenance...so do wetsuits, boards, and most other pieces of windsurfing gear if it's used enough... If I get a fin gouge in my boom grip, I'll dab a bit of contact cement on it to keep it from becoming a bigger issue...I rinse the inside of my boom tubes and lubricate...and keep my harness, inhaul, and outhaul lines fresh. With aluminum booms, I keep the front end connections tight...
WARDOG