This is my overbuilt mount for the L-cheapo V2 laser cutter. Designed to fit with my E3D V6 hotend mount still in place.
NOTE: I have tested this for fitment but haven't actually used it for cutting yet.
I printed mine in PLA at 0.2mm layer height and 100% infill. Don't forget to remove it when not in use because the heat from the bed during a print could cause it to sag. The hole just above the slot is so you can put a screw in from the bottom to hold the heatsink in place. Alternatively, you could glue it or something. The fan is meant to be held on with zipties for convenience.