Nodog,

I just looked at mine on my SlayR and I don't think you'll have any trouble at all mounting it on a Tech riser. I know the riser has an indentation that doesn't allow some rests to mount without a spacer plate behind them, but I don't think you'd need one. If you should then NAP makes them as some of their rests don't fit. The problem is they are only half thick enough so you'd need two, but I don't think you'll need it.

The Infiniti drop away is by far the smoothest dropper I've shot so far, and I had nine droppers on my bow last year. The reason for four different launcher styles is because different people like different styles for different archery disciplines (target, 3D, hunting, etc.). I have the ones that are black and turned up at the ends. This seems to hold an arrow well without having to have an arrow holder of sorts on the bow or some stick-on rubber guide on the riser shelf. I have mine turned out at about 45 degrees and shoot cock-vane down. Cock-vane up gave me some clearance issues. One of the things I like about it is that the cord attaches to the outside of the riser away from the arrow-pass. It doesn't have to attach to the down cable from this position. Ihave mine attached toa Vital Bow Gear cable slide. I'm not totally sure, but I think BowTech or Diamond has a slide similar to it.
The rest is micro-adjustable for everything you're gonna do with it. I don't know if GKF quit making them, but you could try Lancaster Archery Supply. They aren't as widely used as many is probably why you have trouble finding them. A lot of guys don't have any trouble dropping $700 or $800 for a bow, but then scrimp when it comes to accessories and this is a $100+ rest at most places, but well worth the money.

Wish you luck.