Which Bipe kit
The Bell-Air reminds me of the old Sportster Bipe.
The Skybolt sure has a lot of balsa shaping to do. Last time I saw that much balsa was in a Royal semi-scale kit. It looks cool though.
I actually did build a CG Ultimate way back when. It sure flew nice and easy with an OS 90 Surpass. Taught me how to do many many tricks. Never crashed it for two years then stupidly sold it in mint condition for dimes on the dollar to pay for college. I sure loved that plane.