....... While we definitely prefer Floyds that have fine-tuners, when a non-fine tuner floyd is coupled with the same era hump-back Floyd Rose locking nut something magical happens. The guitar stays in tune. Try it, you might just become one of those guys that swears by a Brad Gillis Floyd Rose System. Of course one with the uber-rare hump-back Floyd Rose prototype nut!
100% true: the Head Crasher FR tremolo on that The Function perfectly works...it's smooth and it stays in tune.
I have no doubts this particular non-fine tuner system will be "smooth and stay in tune". However, getting it in tune in the first place could be a problem. Some serious attention to engineering and detail (that's probably not happening on a mass-production scale) would be needed to prevent the string from going sharp when the locknut is clamped down. And then there's string stretch to deal with.
I don't know, I've never tried a guitar with that bridge so maybe it's almost miraculous that it works. I once actually tried to install a locknut on a strat-trem-bridged guitar and failed miserably for those reasons. Every tremolo bridge I've ever had since then had fine tuners.
I even had a Yamaha guitar (RGX-211) that was single locking, but still had fine tuners.
There are some rules I always follow to have ANY guitar to stay in tune...and it doesn't matter if it's a fixed bridge, a vintage 6-screws or a Floyd Rose...
0) HAVE A GOOD NUT!
1) mount strings in the right way in tuners: it will be as having locking tuners
2) tune, stretch strings, tune, play, stretch, tune...and go on until they stay in tune with a "4-whole tones bending"
3) now, and only now, close the locking nut if you've a Floyd Rose
That being said, I was talking about non-locking FR saddles, not about the "non fine tuner" FR...
I would not use any FR without a fine tuning system...
Sorry for the little misunderstanding.