Disclaimer: I am a co-founder of Titanium Goat, but left the company about a year ago to pursue other ventures.
1. Yes, both the expanders "rubber components" are virtually the same, with the exception of scale. Both work very well, as I intended when I came up with the concept.
2. Yes, the TiGoat straps attach with an expander in the handle end. I guess it would only make sense that GG would do it the same way, good idea!
3. You can NOT split the upper shafts of the new AGPs with the expander. The new tubing is much stronger, its......custom, and bomber.
Rant: And for this I apologize, but not really. Now the only reason that questions arise about the similarity of the expanders on the two poles, is because they are the same. Why are they the same? To belabor the point, because I designed it. Some time ago when TiGoat had 2 piece, non-adjustable poles, I was approached By Glen and Grant of GG, to help them achieve the same thing with their poles, along with other things. I agreed to design and build take down components for their poles, which I did, but was then told that they did not work. It does work, it was the same as the current expanders being used, but there was no adjustment of the pole. I should also note that when Glen approached me about this, I said to him that the next step in all of this is to make them adjustable, he replied "We're not that ambitious", and I took him at his word. What I'm getting at here, really goes beyond the two poles. It is not entirely bad to copy, mirror, simulate, etc. what other Co. are doing, this can in fact be a good thing, and can help to drive innovation through improvement and incremental development. While on the other hand, hiring the competition to do your engineering, under the guise of having them do sustained contract work, and not compensating them for it, is unethical, and runs counter to good business practice. Having come up through the ranks of manufacturing and engineering, and making a living at it daily, maaaayyyybe I'm reading too much into this. Maybe those in the world of retail just dont understand "manufacturing ethics". Or on another note, maybe all of this copying is just a sign that there needs to be some market consolidation? but like retail, I'm not really up on all of that.