After using full poly jobs for about a year, I've bought a stringing machine and experimented with Hybrid jobs. Here's my experience thus far: I've tried 2 setups: SETUP 1: Dunlop M-fil 400 (16 x 19, 305g strung, even balance, 100 sq. in) MAINS - Pro Supex Spiral Flex 16g (Synth. Gut) @ 60 lbs. CROSS - Topspin Cyber Flash 17g (Poly) @ 56 lbs. SETUP 2: Dunlop M-fil 400 (16 x 19, 305g strung, even balance, 100 sq in.) MAINS - Topspin Cyber Flash 17g (Poly) @ 56.5 lbs. CROSS - Pro Supex Spiral Flex 16g (Synth. Gut) @ 60.5 lbs. I've tested both for several hours now, and here's my take on the differences between the two Hybrid setups: SETUP 1 (Poly Crosses) Strengths: Better feel (more control on volleys) Easier on the arm (softer stringbed) More spin on kick serves, and topspin serves SETUP 2 (Poly Mains) Strengths: More power and control on flat serves More spin and control on ground strokes More power and control on overheads Between, the two, I prefer the performance of the SETUP 2 (poly main) as I'm more of a baseliner, and like hitting a heavy flat serve, but I do notice a twinge in my arm, which I don't notice in SETUP 1 (poly crosses).... I guess it's nice to have both setups with you. What are your guys experiences with Hybrids, and do the strengths I outlined correspond with your playtesting as well? Also, what is a good, or recommended tension difference between the poly and the synth gut on both setups. Looking forward to your input. - Slider.