I have the Stinger II and Extra 300SP by GP. THe Stinger has a YS63 on in that hauls. The Extra 300SP has an OS 70 Surpass II on it. I voted for the Extra since your Magnum 70 will power it about the same. The Stinger II would also work well for your engine, except probably need tail weight to balance. Both planes are a little touchier to fly than your Escapade but would be a good step up in aerobatic capabilities. I have the RV-8 but not built. While the Magnum 70 could fly it, I personally will be using something more powerful like either a Saito 82 or OS 81/91 FS for more power on that larger airframe. JJUst another 2 cents!