I just tuned one for a guy, go with the GT 35/55's, we cut his to 29", and shoot anywhere between 150-175grains up front should be good to go.. We put on a Bear weatherest, and I made a D-97 flemish with wool yarn puffs, whisper quiet on release, all you heard was PFFT! His string from the factory was too short. We ended up with a brace height of between 7&1/2 -7 & 3/4 inches, with string nock 1/4 above center.
I found the Sage easy to tune, and easy to shoot, in fact just as good as bows costing 3-4 times as much. Hope this helps.