I agree. A swing around is sufficient, but dueling might be a stretch. Especially with no tools, it might not be practical with just MHS/MHS-style threaded parts and thumbscrews.
However, adding one tool may help. If parts can be bolstered by screws or mechanically tightened, that will help duel-ability.
Having made a few "take-apart" hilts previously, I can say this is a difficult challenge. Without some solid ingenuity, it will be difficult to expand on "shell over core" or "hilt with some parts removable".
I think there should be some guidance that addresses the "spirit" of the contest (i.e. objective statement). What's our definitive example? The concept of the "golden gun" is much different than a "disguised hilt" like Kanan's hilt. Simply taking apart a lightsaber hilt is fine, but without specifying what the challenge should follow, you're left with "MHS + MWS, *bam* there's an entry."
Here are some examples of what I mean:
An Eligible Hilt Must:
- Utilize a variety of elements or components, disguised as non-lightsaber devices (e.g. droid caller, comlink, remote detonating device, tricorder, scanning device, etc.), that when combined together, utilizing maximum one tool, results in a functioning lightsaber hilt, with or without sound. *a la Golden Gun
- Separate into elements or components, reasonably un-recognizable as lightsaber parts, that when combined together, utilizing maximum one tool, results in a functioning lightsaber hilt, with or without sound. *a la Kanan
- Have the ability to be "field-stripped" into separate components and reassembled into a functioning lightsaber hilt, with or without sound, using only "assist" tools (e.g. to punch, torque, brace, etc.); no drivers, wrenches, pliers, etc.
An objective statement would be one of those (not all of them).