I just received my emitter, and other saber parts. I was all set to get started when I noticed that I'd make a typical doofus mistake and forgotten to order the sink tube adapter for the MHS. I have a couple questions on this.

1. is it absolutely neccessary to have the adapter for the sink tube (1.5 inch)? or can I just drill set screws past the threaded part on the emitter? I had the emitter machined to fit inside the sink tube.

2. in the sink tube, with the MHS emitter, provided I didn't need the adapter, do I still need to attach the heatsink to the bottom of the emitter as shown in the LED hilt tutorial? in the MHS the threads inside seem to hold the heatsink in place, but the sink tube is obviously smooth, so I figured I'd have to do something to keep it from sliding around in there.