QUOTE(dangrouche @ Oct 21 2016, 10:19 PM)
they are nothing out of the ordinary. You need to chase those threads with some oil and maybe some "sacrificial screws" to get those threads opened up smoothly. They are not 100% perfectly aligned like OEM seats, so, you need to be patient and methodical in attaching the tracks. If alignment is off, then I would err on the side of enlarging the track holes, since tracks are readily plentiful. The harbor Freight tap and die set should help you get this project done. load the screw in a counterclockwise direction and listen for a click, this is a technique used when reattaching grip screws on a handgun. once you hear the click, the screw is seated on the first thread, then you proceed with turning the screw by hand and feel it loading into the hole. then chase it fully down the entire path of the threading.
Thank You for replying and providing detailed instructions!!