The Spectacular Return of the ESTES BT-65. I still have 2 old fin cans from ESTES Challenger II 24mm motor booster for the ESTES 110 ASTROCAM and a few nose cones. The tubes that I have are 12 inches in length, so I will definitely order some of these longer body tubes and using less tube couplers is a must for TARC. Thank you, ESTES, for bringing back the most heavy-duty paper body tube on the market.