ORIGINAL: diggs_74
I have the Sig Extra 300XS with a OS 1.60 and an 18x6 Zinger... It weighs right around 13lbs and I can tell you that the pull out will probably not be that great. I personally think it's a little too much weight for that engine as far as 3D is concerned. That's just my humble opinion though.
What RPM are you getting with that zinger? Is it the zinger or the pro zinger. I have a 12.8 pound edge with 1.6 and although pull out is good, it is not brisk. My best pulling prop has been the apc 18 x6W--felt like a big improvement over the zinger and the pro zinger. If you did not mind investing the money there would be significant gains in going to the 19 x6 or 20 x6 Mejzlik.