You wont be stepping on my toes at all. You WILL be finding out like I did that the material cost and the time and effort in cutting the spacers makes the profit margin pretty small for a lot of effort. I started with free scrap material as well, then progressed to buying it fresh when the scraps ran out. Re-processed UHMW has all of the properties required for this application and is much easier to cut than virgin FDA approved UHMW(who needs to eat off of their coil spacers, anyways? LOL!). I also use a drill press and professional-grade holesaws spinning at a slow rpm rather than a band saw. This works pretty well and keeps everything perfectly round and straight.
One more thing you will run into is newbies coming in wave after wave, asking you the same questions over and over and over again. You'll go for a month or more with no orders, then you'll hit a spurt selling out everything you've got. All the time you'll have people telling you that they heard they could run 2" or higher up front without any trouble, or that so and so on some other board is running 3" spacers up front without any problems at all, so why wont you make higher, etc... Even if you create a topic explaining in-depth why you want to use 1-1/2" in the front and 2" in the back, the exact make, model and year of rear shocks needed and even explain why certain things should also be done, like strut mount flips and swaybar removal, you will continue to get email after email, pm after pm asking the same exact questions over and over and over...
Maybe if you could come up with a post consisting of entirely pictures with no words, the brain-dead, lazy newbs that wont read a post longer than one sentence and wont search older topics for the answers to their questions will finally get the message and be able to stare at the pics and drool on their keyboards, while still learning the answers to their questions...
Am I bitter? Maybe a little, but I'm also burned out on making spacers... please, by all means, have at it. Enjoy your run and good luck to you! LOL!