I'm currently at work, but this evening I can take some pictures of the light, no problem! Beamshots are not possible however.
I have no idea if that compartment is a new one, somewhere I read about a 17670 for the old model, but I never saw one. I asked Henry about the normal compartment, if it has the same huge slot now, he denied, it has still the round part in the middle. That one is optically nice of course, if you don't install a lanyard, but the slot has much more practical use and HDS lights are users for me.
The compartments are interchangeable with the old version, they are the same technically. That's a huge advantage of course and the reason to take a 19670 with a new light. Optically the same, the beam is the biggest improvement on teh new version. I was somewhat upset when I turned on my 85Tr for the first time : Tiny bright hotspot surrounded by a more or less usable spill. I already had my Clickys at that time, while I preffer the wider beam as I like it floody, the narrower beam is still much more usefull than the tight spot on the old Twisty.
To be honest though, my Clicky 170Cn has double the output of the Twisty 85Tr and you have to make compromises, but, still, the hotspot could have been larger and less bright to my gusto. If we leave the little differences of my two high CRI lights apart, the new Twisty has exactly the beam I love, with the particularities of the P4 high CRI : Nearly white hotspot surrounded by a yellowish-brownish corona which goes into a usable yellowish orange-tinted spill. That's white-wall hunting, in real use you'll see vibrant colors in nature, which are a little darker in the corona-part of the hotspot.
If you don't like that and preffer white yellowish tinted light, just take the 140 Lumen emitter, I guess it produces about the same beam as my Clicky 140C(E) which is a more or less big hotspot surrounded by a well-lit spill, the best compromise I can imagine for the P4. There's one thing missing on all my HDS : Beam artefacts. I was used to them with Cree XR-Es, that's probably the main reason we haven't seen any Cree emitters in Henry's lights. I would not be surprised to see an XP-G showing up however (nope, I have no info at all about that)...