Some may have already read it over on the Files but I'll add it here. I recently put together an izzy DSA receiver with a parted together izzy kit that I had built previously on an IMBEL. The DSA barrel threads were too tight, so tight I couldn't spin in the barrel by hand more than a full turn. With tools I got it in not quite half way before it screeched to a halt.
Some tap and die work and all was well, the barrel spun in like it's supposed to. All else with the receiver went well and I was relieved to find that everything else was to spec and I didn't have to modify good parts to fit a not so good receiver. The rifle shoots well and I'm happy, kudos to DSA for making the Israeli marked units and making them well enough that a home builder doesn't have to hire someone to build them.
These truly are screw together rifles. If all components are made properly anyone with a couple of simple tools can safely assemble one and it run just fine. This is just as FN designed it to be. If grinding, cutting, or modifying any piece of the rifle is required to put one together then something is wrong somewhere.
Joemomma, please do post pics of your rifle when it's complete as I'd love to see it. Sound like a good combination of parts and features.