RE: Suggestions wanted... Mid-size bipe.
A Balsa USA Phaeton II would be perfect for the 70 Surpass. The photo shows mine that I'm currently flying with a Saito 80 which is an abundance of power. I originally had a Magnum 52 four stroke (shown in the photo), and it flew well and very realistic, but required some lead in the nose to balance. With the Saito it balances without the lead and the performance is great.