First post here. After several decades I'm considering getting back into model rocketry. I've been doing a lot of research on the one piece plastic fin cans and find the amount of information out there is limited. I'm especially interested in the BT-50 size fin cans and up. I would like any information you could share concerning brand; availability; type/shape/etc. such as number of fins, slide over tube or onto pilot diameter, has integral launch or lug or not, dimensions, etc.; quality, including straightness of fins; durability, and so on. I am fairly aware of Estes offerings (http://www.rocketshoppe.com/info/Estes_Fin_Can_Reference_V2.0.pdf, which may be a somewhat older listing); Quest's offerings, although their website gives minimal information, and the two Acme cans. Thanks in advance for any help you can give.