Paul, feel free to chime in and add your perspective. You know more about this than I do. I'm using a Floyd rose speedloader fixed bridge. The strings have (brass?) bullets at each end. The string holders on the bridge have a quick release and flip up to allow the quick change. When the string holder is snapped back into position the string has tension on it already. Within the string holder there is an Allen screw that does the rough tuning. It appears to have 3/8-1/2" of travel. The saddles are moved manually with an Allen bolt like on a traditional Floyd to set the intonation. Fine tuning is done with the thumb screws, again like the usual Floyd. The 1/2" of necessary longitudinal travel is handled by the strings being mildly tensioned when snapped into place and then completed with the rough tuning screws. This hardware was cannibalized from a Floyd guitar and great pains were taken to copy the dimensions so the distance between the nut and bridge as well as the neck angle and bridge height were within a few thous of the original. And this system uses adjustable height ball-topped threaded posts instead of the knife edges and posts in a Floyd trem. And the tilt of the bridge is adjusted with a third ball-topped threaded post (of course a different size than the other two) at the ear of the bridge. Finish on the guitar is drying right now. When I start to put the hardware on I'll take more pics to illustrate. But, bottom line is, I think you're correct about building a headless without some was to get the strings roughly tuned. The fine tuners can only do so much. I'd be interested to know what others have done to get around this. I like the Floyd system but currently it's hard to find them. I would consider using Steinberger or jcustom hardware but there must be other ways. Steinberger post tuners rear of the bridge?