Decided my collection needed one of these and glad I made that decision. The top cap/fill is different. Just a 1/8th turn and open. For the mod: very simple, no real bells and whistles. Maybe after they get a few more mods under their belt that'll change. Hell, maybe one day they can get an FSK board in one of their mods...... The damn thing is HEAVY. I already expected added weight due to triple 18650s but the mod by its self is heavy. Left to right: Ijoy Maxo Movkin Disguiser HohmTech Home Slice Sense Blazer 200 Wismec Reuleaux RX200 Wismec Reuleaux RX2/3 @SirRichardRear here is what it looks like with a 30mm tank on it. (Ohmega Calypso) All in all, ,this was definitely worth the money and I am glad I made the purchase.