What is an XR-Hop?

When I googled it, I came to the conclusion that it is different from ER-Hop. On Hunterseekers Website, he mentions both, but it doesn`t sound like they are the same.

https://sites.google.com/site/hsarmory/miscellaneous/news/upandrunning

On August,24,2011 he posted:
"IR-Hop and IER-Hop

I'm officially announcing the new IR-hop and IER-hop here. This is my new ice hop designed to tolerate extreme cold weather and still function. It also is very applicable to things like GBBRs which squirt freezing gasses on the hop, as this maintains zero. Below is an image comparing the IER-hop to a regular ER-hop next to two raw cut (unfinished) barrels."

On December,12,2011 he posted:
"XR-Hop

Yes for those of you who have listened closely I've mentioned the XR-hop's existence a couple times now, but never any more than this. For the people who actually waste their time reading the crap I write I'll post up a picture of it so you can see just what a monster it really is:"

There was a picture below that, however I couldn`t open/view it.

Also some people in this forum were saying they are two different things.

I'd say from a technical perspective it would be any patch connected to the barrel and separate from the bucking. This leaves wiggle room for those people that perhaps don't just attach a barrel shaped patch and instead modify their R hop patches to have their own designs on the intaglio. Not that that's necessarily something I've seen, but I have thought about it and I'm sure others have too.

The new generation of "R-hop" buckings however has muddied the water. Their designs do very well mimic the design and performance of what most people consider to be an R-Hop. Performance being the one thing no one can seem to agree on definitively because there's never been any well publicized, unbiased, detailed and objective testing. Either way, "R-Hop" buckings are still just that.. buckings.

So either you're going to go by patch design, which seems quite limiting, or by how it's installed/fabricated - there by leaving some leeway with how the whole thing is designed. I mean an autobot, super, wonder, mr hop, etc all have different patches, but we still call them buckings because that's what they are.

The XR hop was an experimental idea that HS5 was toying with. He sent me a prototype for testing that I simply never got around to and eventually got thrown out when I did a clean up of my stuff.

The premise of the idea was to cut the first inch or so off the barrel (square and deburred/chamftered). This is the hop up window side I am talking about, not the muzzle end. It was then replaced with a 3d printed housing glued to the cut end of the barrel that hand a long narrow hole in the top (something like 2mm wide by 10mm long or so. In that hole was fitted a strip of the R-hop material. The idea was that a long narrow contact patch would reduce the chance of side contact that could throw of the spin axis of a bb.

I think the idea never went anywhere do to the inherent complexity of attaching the housing straight and square to the barrel.

So if I understood that correctly, you had to cut the part of the barrel where the hopup-window is straight of,
and the 3d printed housing basically replaces that part of the barrel?

So it looks like that?:

33PATCH33BBBBBBBBBBBBBBBBBBBBBBBB
O->
333333333BBBBBBBBBBBBBBBBBBBBBBBB
3D-part Barrel

If so, I think it would have been better/easier if you cut the hopup-window-part of, but then just milled the small slot into the barrel (assuming that a narrower patch would reduce the chance of side contact, which I doubt).