Well it's good to be back after the long siesta, Many are right his game his rules, while 100 grains will do fine on just about everything in the world, i agree with gibblet , he must have had a few too many bad archers, which would explain the 125 min. My advice go on the trip have a good time, change your setup to 125, it's easier to do with mech's but if he wants a fixed blade, that's ok too , it will probably take a little time to do it. Make sure you mark your sight so you know where you were when you were shooting 100 grains, it will make things easier for you. I understand that it could be a big pain in the butt, but he's got your money, it may take years to get it back from him. Good luck.