I have had a pro chrony for several years and mine is right with any others that I had checked my with at tournaments. I don't know the brand of scales I have but they have been quite reliable, as I have them for 20 yrs. I don't know your buddies, but if were me I would opt to buy the equipment by myself and if your buddies use it charge them a little till they pay for a portion of the stuff. Cause if it gets broke or tore up there will be a problem. Trust me.