RE: Anyone ever heard of the big 6?
I reckon you use every muscle in your body doing a cartwheel, but if I told you to go do that for a great beach body you'd laugh at me.
The guy had given you some good advice (use compounds), but don't listen to hard and fast rules like "Only 6!" thats just a load of ****ing crap. Don't get too one dimensional with your training, or your results will be too.