The FS 70 may pull the DR1 scale since it has gobs of lift, but I elected to go with a Saito 91 (plenty of extra power). One of our members has one also with a Saito 82 installed and it flys it well also. You can never have too much power . I angled my landing gear wing more than the bottom wing after the intial flight because the DR1 tended to baloon on me a bit. It settled down after making that change. Good luck, and post some photos of your DR1 and DVII when you get a chance. They are both sweet birds!