It's all held together with a carriage bolt and the only glue is located in the emitter. I got great advice from Jakob2121 which I copied below. Only difference with my route is that I used a dremel to cut around the circumference of the emitter to expose the bolt head before grinding it off. You'll be left with just enough carriage bolt to re-thread the tip and screw on a Roman's emitter. There is also plenty of internal space in the grenade section if you need to add an extension to the carriage bolt for extra length. It takes a M8 x 1.25 (or 5/16-18) threading die to cut the threads which will work with Roman's 2-piece emitter. His single piece emitter has a different tread size.
From Jakob:
"The emitter is two parts - the base "cup" and the actual emitter plate/first collar. The center extends down into the cup and is epoxied into place. I'll be honest, it was never meant to come part. I'd say the easiest way to do so is to drill a decent hole through the emitter plate so that you can see the head of the carriage bolt. That will let you see the internals and know how far down to cut. If you then cut the emitter off
right underneath the bolt head (or grind off the head, which is what I did), the saber with both disassemble and you'll have a threaded rod that the Roman's emitter will screw right onto while being more or less exactly the right length.
Here's a really low-effort mock up to show you want I mean:
Once you have the bolt head off, the other pieces will slide off, as they're not threaded. Note: the alignment pins are tiny and aren't glued in, so disassemble it somewhere you can collect those when they fall out."
Jakob wasn't kidding about the alignment pins. They're itty bitty and once the bolt head comes off there is nothing holding everything together. I wrapped the whole hilt in a bunch of foam and tape knowing that I'd probably drop it.
Let me know if you have any other Qs!