No worries, it's all part of the learning process! There are several options out there for you, it's just down to trying things and seeing what works. Here's a couple off the top of my head:
The G&W fret slotting box is pretty much a direct replacement for the $tewMac box at a lower price, and it works very well. Shipping takes a bit if you're in the States, but it's completely worth the wait. It'll accept the majority of commercially available fret scale templates without a problem, which is really nice.
If you're making your own jig (the upside-down razor blade trick, right?), you could just order a pre-slotted board from LMII or somewhere similar and use that to make a copy in Richlite. That could then serve as your master template and be serviceable for a long time.
I'm sure other members will have more (and better) advice, so stay tuned! Oh, and welcome to the club