ok I have Vamo2 on the way from the slow boat from China fast tech. I found a Zmax2 for 60 bucks and a Sid for 44 bucks. Which one should I get? Do they both have RMS? Thanks for your help. Also where is a good place to get 18650 batteries fast? I ordered off Amazon and not expected to arrive until December wish I knew before I ordered. Ok thanks.