Oh I agree whole-heartedly. There's a lot of variables that go into tunning. Some times though understanding what people got work serves as a waypoint along the way though.
I've got some 3555's coming to play with, Big Jim says I should get them going great, and I trust his judgement, that's how he makes his living. My only fear is going to be total weight, and that's only coming from a calculator's numbers, not trial. A 3555 out of a center cut, FF stringed, 50# bow is only going to tolerate so much point weight without building the strike plate out some, (an option, but not prefered yet). Now, with 200 up front, and cut to 29" (about as low as I can go) I have to build the strike out .2", and that'll give me 481 overall in weight. Not bad at all, and I hope I can do it. Like I said, if Big Jim says it'll work, its certainly worth my effort to try. Additionally, I have 5575's cut to 29", (I know, I know, way to much spine) that show slightly stiff with 200. Going to the calculator again, it says with 250 up front that's a perfect match weighing in at 552 total. About 12 fps less speed, but that's not worth crying over.
The caveat in the 3555's will be how fast the carbon spine recovers. The calculator says it'll be weak, but that may not be noticable if it recovers as fast as people say it does. Who knows? All of this is theoretical until tested, I just like hearing seasoned shooters tell me what they've seen. I like a healthy weighted arrow for penetration, sound, and bow performance. Pigs aren't indestructable but if arrow A and B both shoot great, I'll choose whichever one has a little more weight. Thanks for all of your responses, you're all very helpful.