well i have done it built my first home made laser from a brand new 18x lg dvd drive the thing is how far do i drive it ? first run was at 250ma for 10 mins and it stayed stone cold i did not want to drive it any harder untill i got advivce from you guys the diode holder and lens was from an old laser printer heatsink cut from an old amp i took some pictures but i dont know how to attach them to this post