Toppers belong on mattresses, not Hobies.
You don't see them on real sailboats. The rotation of the topper is one of the things that has always concerned me about the current flock of designs.
I guess we are stuck with them, but our flexible/boomless/furling masts really make it a challenge to line things up. Fusion, Chaos, DM and others know this by now, so allow me to generalize.
If the jib halyard twists far out to the side (out of synch with the main) we get sloppy upwind handling and can't control the "slot" opening that is critical for funneling wind over the back of the mainsail. For downwinding, it may be great though.
To work well, the jib really begins with a complimentary size, cut and angle to the mainsail. Normally, it would move slightly WITH the mainsail via a fixed connection, such as a mast tang. But our topper rigs need a perfect balance of backstay rigidity and stretch, to accommodate the considerable natural movement of the TI mast. And God forbid we should limit the rotation of the furling mast.
My thinking cap tells me that he shorter you can keep the topper arms, the better, with the front one being VERY short to control twist. The rear stay, I would guess, should be under resting slight tension with the ability to stretch. If that's a problem, maybe a double side stay would help with the halyard rotation. (Think a 3 armed sprinkler head, made of aluminum).
An adjustable bowsprit, similar to Chopcat's might accommodate different jibs in different conditions, and maybe a spinnaker.
I keep looking at the TI3 and thinking, an AI jib would be an easier design project, or maybe just a downwind sail.
My hat's off to you jib pioneers. Hope Hobie eventually gives you some engineering support for your worthy goals.