Robby did use the site injections, he just didn't have the cell base or the reaction that others got, I'm not saying arnold did to me he looked like a guy who had genetics and just didn't train them enough in his earlier days. But i have seen calves with with a lot of lower muscle belly inconsistency thats from site injections. I agree with you guys site injections started in the 90s to the best of my knowledge, my conversation with Robby was early 90s. But theres no doubt when not overdone they helped a lot of guys, before they all went overboard, Flex, Dexter, Ronnie. If i HAD to say Arnolds calves had help in the late 60s 70s i would lean towards site injects over any type of implant, my personal opinion that the guys a genetic freak and smart trainer who spent the majority of his training time working on his weak points over his genetics strength's