>Tony
If I had only checked jemsite last weekend you would have had your answer by now!, sorry about that
The thing is that the guitar stands in my other "house" (well, the room/cave I live in during the week near the university more specificly

), I can provide your info at wednesday. I'll measure my JPM as well (to be sure!). In my experience the JPM is a
Viper neck and thinner than the neck on the RG2820. The feel of them sure is something different (more than you would suspect if you see the specs). The RG2820 has a lot more the feeling of a JS-model or a F-word strat, the radius has to do with that as well.
I'll measure the RG2820 and JPM as soon as I can, I think I can get you the info by wednesday!