Bingo! Thank you

Yea I noticed the gun I got 2nd hand is shitty, it feels like it just doesn't have the flywheel power and most of the time slips grip on the firing pin. A fault with the design of the mechanism is to blame, the 2nd fix nailers they use uses a CONSTANT FORCE design where once the firing pin is engaged, the force is always the same, but for their framing nailers they came up with this silly design where the firing pin cocks the little roller wheel to engage the firing pin, but how fast it does it is critical, as if it doesn't pull it fast enough *due to lack of battery power, or stiff mechanism* then it can't put full spring force on the firing pin, so it slips easily.. I sorted that on mine but the flywheel stops absolutely dead still, It's a type 2, and it clearly doesn't have the power necessary to do the job. Type 1 was a "faster" flywheel ,type 2 is slower but heavier, not sure about 3+ onwards, but the issue is also is in the nails, I've noticed if the wood has even a bit of knot, the nail would bend like a snake inside of the tool and jam it really hard - so it's less a issue with the tool having the power since if it had more power it'd just tear itself apart once the nail jams like that. Really odd bit of kit that.