Problem: Troll rda will not sit flush on flagship mod. Got the mech for 20 bucks and want to make use of this rda that I'm not currently fond of. Both are authentic. Adjustable 510 on troll is as short as possible. Floating pin on flagship cap moves freely. Screwed atty into cap, insert battery, assemble, there's a gap, but firing button is at full throw. (Flagship has a lot geranium throw than many) Took the delrim out, reassemble, everything fits flush, slight battery rattle, but the button is an extremely short throw, not what it should be. The long throw was what made me decide to get this as I can toss it in my pocket. Is there an atty with a shorter 510? If so, could I get a few suggestions please?