It's a great idea, but it will probably be easier if you add 3' so you don't have to scratch build a matching nosecone: the Mean Machine uses the Red Max nose cone, so if you use the

3" Der Big Red Max nosecone and 3" OD tubes (you can buy it in 34" lengths from

BMS), you get a 12' Mean Machine with the right nose.

Or, if you use the

4" Mega Der Red Max nosecone and 4" OD / 3.9" ID tubing (many sources in various materials), you get a 16' Mean Machine. I'd really like to build this one someday, and possibly a 3" as well.

The 3" parts are of course

*much* lighter than 4", and BT-80 is much lighter than 3", but you have to figure out the nosecone.