I was expirementing with my laser pointer and magnifying glass and I really loved the burning results. Is it possible or is there an optic that I can screw into the focusing cap to where i don't have to use a magnifying glass? I notice on my gatling laser focusing cap that there is still available space where it is threaded by the lens the factory put in. Basically I want to know if I can add another lens in front of it. Also, does anybody know the thread dimensions for the same threads that the factory lens is on? Thank you guys