I modified my extraction system specifically for BirdMan jumps ... I made a stabilized D-bag with 9 foot bridle (pin to base of pilot) and 30" zero-p with plastic handle. I had been flying a GTi and using this system with a Crossfire 119. I deployed in every possible way (excluding something totally stupid) and had no problems to speak of ...
But in switching to a SkyFlyer 3, the increased forward speeds were making deployments on the scary side. I acquired a Triathlon 120 and am now using this with the same extraction system. I have an original Mirage G3 (no cut out corners). Now since having this Triathlon deployments are good. I don't slow down for a second.... full speed ahead, drop the finger holds and go for the pilot... less than 45 degree openings every time.