Anybody that wants to argue with a 61 year old doing curls with 3/4 of his body weight is just plane nuts. Give him the money and don't wizz him off any further then he already is!
I've gone thru physical rehab for two torn rotor cuffs to the tune of about six months in the gym. I've only seen one guy using the 75 pound dumbbells and he worked there as a trainer (he looked like he had no neck!)
Regards,
GtG
3/8. The man was 200 pounds.