You don't, there's no way around that. Just the same as any other plane that utilizes the FT EZ 3ch micro pack. That's a drawback inherent to the system, whether using it on one of the FT planes made for it or when using it on a custom design. It's light, it's convenient, and costs $40. If it crashes, I'll live with it.2 Motors shut down in flight(worst case, 1 dies in flight). Explain how you fly it?
If I wanted more scale authenticity, full roll maneuverability, etc. I'd go with at least a 4ch prop-in-slot design, but now we're talking more weight and complexity on a design that's somewhat finicky and has pretty poor lift economics. I have 4ch planes, and plan on making plenty more. That isn't the point of this build attempt, to make a decked out, fully capable SR-71, It's just to take the FT EZ 3ch pack and go "what can I make with this that's cool?"
I'm not going for anything high-performance, just a simple little profile park flyer that looks like an SR-71 and can cruise around in basic flight, nothing fancy.