Google it, Damn it looks good mate, What sort of mods are these, Can i just search Regulated mods to find similar types on a few vape shops online pages to have a browse, 21700 though, I will need to get rid of my 18650's and charger if i go this way .lol it never endsThe Berserker Mini would look great on top of the Cold Steel 100, comes in stainless Steel for matchy, matchy. Loads going for it including it will accommodate 21700 battery. Only con whenever a fresh battery is inserted the wattage always defaults to 35W no matter what atty' is on top!