
Hi Max,
I haven't ridden the JP board but I'm not sure moving the front strap inboard is going to help you jibe, having said that I also don't think it's going to make it any harder.
For me the key to a successful foil jibe is your back foot placement. As you bear away in preparation for your jibe, place your rear foot out on the opposite rail. This wide stance will give you the stability needed to get you around successfully.
Good luck
Simon