For quite some time I had small problems with my arm and yesterday I have finally decided that (no matter how overpriced it was) now is the right moment in my life to test a natural gut hybrid ... I play with Head Flexpoint Prestige MidPlus (18x20 stringbed) and until recently I was a huge fan of Luxilon strings - my favorite is still Supersense but recently I was HUGELY impressed by the control with Alu Power Rough ... and also shocked by the harshness of that string, which is a big part of my current arm problems To cut the story short - I decided to go with the 'Federer style' gut hybrid - with the natural gut on the mains (for best feel and comfort) and with a poly in the crosses to cut a little from the power and still be able to get some control on very heavy hits - the main difference is that the poly that I have chosen for the crosses is NOT Alu Power Rough but instead something A LOT softer - Kirschbaum Competition 17L (1.20) - and for the mains one of the least expensive alternatives - BDE Rally Natural Gut 16 (overall cost for two half-sets about 18 US$). My initial thought for the tension was something like 27.5 kgs (60pounds) for gut and 25 kgs (55 punds) for Competition but I was a little afraid - since a recent post from Supracool94 mentioned that Babolat V.S. Gut 16 on the mains @ 58 pounds and Luxilon Big Banger ALU Rough 16 on the crosses @ 52.2 pounds on a Mid Prestige was very bad for him - and in the end I only went 26.5 (58.6) with 24.5 (54) - but a small note - my stringer is VERY consistent but it might be possible that his setup might create a small (but steady) error on the minus side, so the actual tension from a much better stringing machine would be like 26 with 24. Anyway - all what I can say is WOW, I'm hooked The result is really soft on the arm and the feel and precision is VERY good, the sweet spot is now a lot bigger and the vibrations are zero (with my 'rubber between strings' home-made dampener) - however I will use the other half of the sets at the tension that I initially wanted (on the current setup the power with Dunlop Championship Brilliance (unfortunately used in all senior contests around here) is quite very high for somebody coming from Luxilon and most of my decisive shots that were a few centimeters in are now out, sometimes even 20 cm or more). So far (2 hours) the strings to not move (I guess that the gut is actually moving but then sliding back on the slippery poly, but that might change); the gut only micro-frayed in two points. The only major questions remaining are tension stability (that I expect to be good) and overall durability - and if I can get 8-10 hours of singles play (or over 16 in doubles) that type of hybrid will become my 'official competition string' - I don't play very often in competitions, so the extra cost will not be a huge problem, but it might become one if I will start playing with it all the time (small note - I play like 99% of the time on clay, so the numbers above might be waaay to optimistic from me). Another way in which it might cost me could be the fact that while I am a very 'frugal' player and I was always happy with only two same-model racquets, now I might need to get at least one more (or even two more) - when I go for a weekend competition I'll probably need two gut hybrids but if the weather turns out to be wet I will also need something else ... I will also test Klip Legend and Armour as the gut component and Plasma Pure for the poly, but I will also keep an eye for a very similar hybrid for wet times - maybe Biphase with something ?