Not sure if this is specific to the Paasche design of their airbrushes, but the two parts that sit behind the trigger consist of one part that the trigger pushes against (the needle passes through this, and the needle chuck(?) screws onto the end of it to tighten/hold the needle). Around that, is the spring assembly that is threaded into the front part of the body. What I'm unsure of is how far that spring assembly needs to be screwed in, and what sort of pressure I should expect to need to pull with my index finger in order to use the airbrush while having enough spring pressure to push the trigger forward, yet also not wind up with muscle fatigue. Sometimes I feel like I'm lacking control because I get this sort of sudden burst of motion when I start to pull back on the trigger. Like it's got a threshold of pressure required for it to start pulling back, but then when it reaches that threshold, the trigger is pulled back *too* far. This makes dagger strokes a bit more like... candle stick strokes or something. Also, if anyone has any experience with both the Paasche Talon, and the Iwata Eclipse HP-CS, I'd love to know if there's a substantial difference on the trigger action. Will add it to my "reasons you were stupid to buy a Talon" list while I save up to buy an Eclipse.