I recently acquired a .60 size stinger with a os 91 fs max (60F carb, high speed and low speed needle). This is my third airplane and I'm having some trouble tuning it. I've been spoiled by having the relatively easy to tune LA .40 and .46's on my previous planes. Before I ask this question, let me point out that I've referenced all available guides in tuning, but I just cant seem to get it dialed in. It starts fine, but when I try to give it full throttle, it sputters and dies. Even when I seem to get it to a point where it will run, the thottle is very sluggish. Any suggestions on where the high speed and low speed needle should be set (I've tried the air blowing method)?

Thanks!