I'm of the opinion that someone with a hacksaw and a shovel, with ZERO porting experience, could build a better engine than both Trinity and CT. But thats just an opinion. There are far better builders out there with MUCH better customer service as well.
There are numerous reasons that can cause loss of compression, but they all deal with gaskets and piston/rings (with exception to actual HOLES in the jug/head). The only way to know is to tear it down.
2002 Banshee Ported cylinders, ported reed cages w/Boyeson dual-stage reeds, Wiseco stock bore, Flotek .035 milled head, K&N intake adaptor and filter, Trinity pipes (for now anyway), +3+1 arms, Fox TRX450R front shocks Badass without the big bill
1987/90 LT500 Ported cylinder, ported reedcage w/Boyeson dual stage reeds, Wiseco 530 bore, Trinity pipe with custom fabbed silencer, Custom fabbed 144 front hubs and 115 rears with Motorsport Alloys Tork wheels, Sidewinder chain and sprockets, other stuff It's a Zilla, 'Nuff said