we have a large collection of laserable designs at the Maker forums. And a lot of modification info for lasers, especially the K40. And don’t forget that the Maker Forums has almost 400,00 posts on a wide variety of topics including Laser cutter/engravers, wood working, electronics, etc.
Here you will find a curated collection of website and software links of interest to makers that @HalfNormal has found and posted. Check back often to see what little gems he has found: