There seem to be different versions of the new type forks (well, newer, the CGT, Himalyan and now the twins are different again).
The first type of fork with the internals as shown in Haggis' picture appeared on the AVL 350 Thunderbird models in India, and are disk brake leading-axle forks (BENT??? come on, guys!). The stanchions have plain tops and push into the top yokes, as well as having screw-in caps on a standard R/H thread. The alloy sliders have central mounts for the front fender. The same forks were used when the 350 Thunderbird went UCE.
Next we have the early C5 and early B5 forks as per Scotty's original tutorial. These are also leading-axle, disk brake, though the sliders have lugs for traditionally mounted fender stays. The stanchion tops on these have the traditional RE external threads and will screw into just about any pre-2009 RE India headlamp casquette or even a Redditch Interceptor alloy top yoke. The stanchions have screw-in caps too, though these are on a LEFT HAND thread.
Then we get to the 2012-on type C5 forks, as in Haggis' photo - same internals, but on ther slider the axle is now in line with the center-line of the forks, plain stanchion tops with the Thunderbird-type right-hand threaded tops. 2016/17 B5s ended up with these too.
Finally we have the interim B5 forks (2012-2016?), still with leading-axle sliders but with the plain stanchion tops and r/h threaded screw cap as above.
There's also a drum brake version of these on some Indian 350 UCE models.
I think that's the lot unless anyone knows of more.
You CAN modify these forks for in-situ oil changes, I shall be doing a set of B5 forks soon and will post some photos.
A.