Hey, KouklatheCat how's it going? Let's see, the backside (nice reference). The actual cutting took about 4 hours. That's quite a lot of time considering this was an 8"x8" cutout. The secret is to make your stencil as smooth as possible (use very thin cardboard like the kind you find in a 3-pack men's briefs <---you can't go wrong with these kinds of cardboard).
Cut the stencil using a thin razor blade as if you're drawing it, not slicing <---causes jaggy edges
Spray paint your logo into your siding then use a thin marker to make adjustments if necessary. My friend and I discovered that this method was more effective than just tracing the outline of the logo. (while cutting, you'll get sparks and stuff that'll obscure the details)
It was finished off with a quick grinding dremel attachment. (don't go crazy with this, it'll really mess up the curves, quick and easy for the burrs)
Pain in the ass: sanding by hand to really smooth it out. Attaching the lexan was no sweat.
I think the Q3 logo will look sick!! Before you do the actual cutting, warm your wrists up (I know it sounds gay, but it really helps in reducing injury, remember you'll be cutting for a damn long time). Wear dust masks.
Good luck with your project and send us some photo links once you get it done. Peace