Finally flew my Custom Bullet #10015 for the first time this weekend. Built it 15 yrs ago and never flew it until yesterday. Flew it on a B6-4 then a C6-3 using an 18 to 24mm adapter. After two successful flights, I'm thinking I want an upscale version. Thinking of building something to fly on a 29mm. My thoughts are to do a BT70 main tube with a BT60 inner and BT50's for the out board tubes. Has anyone done an upscale Bullet that wants to share?