Good to hear. Thanks!!

Most tubes are made with pre preg.

Adding extra layers of pre preg is fine in my experience. I have done it plenty of times.

Sand the tube surface, add extra layers and shrink wrap or vac bag and cook.

Any advice on how to adhere your prefab carbon tubing to pre-preg carbon fiber? Example: a 42mm ID tubing which happens to be the exact size id of a bicycle Bottom Bracket PF30. (press fit 30). However I need to beef up the wall thickness (add 1/16 ") by wrapping pre-preg around it, then compress and heat to cure. I am concerned there may be a delamination issue between the tubing and the pre-preg. Is there something I need to treat the tubing with prior to applying pre-preg?