It would be helpful to hear the raw tracks. Pre mix. Also, not sure what your setup is. But unless you're at one of about 12 studios in America, I doubt you have acesst o those mikes, those pres, and that room. And that money. Everyone is searching for that, look at all the sound replacement tools now ... It's a worthy quest for sure. Just keep things in perspective maybe..Yeah, a fat snare sound is probably the easiest sound to get in my experience. Just slap something on the snare and you're golden. Ey, we have a pretty similar method it seems. My favourite is a 2" o-ring cutout of a really thick fiberskyn head. However, I've yet to hear a single drummer or engineer be able to get a snare sound like Jeff had in the 70's. I've heard some try their best, but haven't heard anyone be able to do it yet. It's either too fat, too low tuned or not right in some other way. The perfect example for me would be Night by Night (Steely Dan). That's a fantastic snare. The snare on the tune Gaucho is also pretty fantastic. Tight, tuned pretty high, but with a low, fat as hell sound.