joebuck,
I am a little confused ? Did your bolts bend that much or did the softer elm tree allow the bolts to sag as the wood compressed under you ?
Agreed about hunting hardwoods only, we do not climb populars or pines here in TN. We use GRADE 8 bolts that are 3/8" X 8" and have no problems and I am 220lbs. I drill my holes in hardwoods at about 2 o'clock as well. Not sure if a 1/2" system would benefit you or not ?
I drill four holes at the top for foot platform. tried the 4 steps on a ratchet strap, what a pain to get tight enough that it does not shift on you and did I mention the noise and weight of the system ? I carry 16 or 18 bolts depending on where I am. I also try my best to hunt a spot the first time on a evening hunt if I can. That way I can take my time and also know exactly how high to get the first time. Next trip in just slip in your bolts and sneak up the tree. JMHO