[dabigpig]

well i'm not a zip zap guy but i can help u out with most of that list

Layman's Tri/Dual - do a search for laymans dual cell mod.

Pigtail Cat5 - take a peice of cat 5 wire. u can buy it at radioshack and computer places it's the wire used in eithernet lines and phone lines but any solid copper core wire would work. you remove the normal antena and solder this wire in it's place then twist it around a pen or felt so it resembles a pig's tail.

Spring Suspension - if you can find a pen that has non magnetic springs in it or most slot car springs will work. first cut the spring's to the proper size to fit on the top of the front nuckles (most pen springs u will need to streach to make the springs springey) then you simpily take apart the front end apart and place the cut springs on the top stick of the nuckles

Rare Earth Magnets - goto radioshack and buy some rare earth magnets (REM) and replace the ones that are in the steering mechinism.

New (Gen3) ZZ PCB - not sure but i'm guessing these are the newes't zz's

Tab lowered - well you can take a credit card and cut it so it's the same shape as the front tab then cut the front tab a tiny bit then glue it under the existing front tab.

hope that answers some of you're questions