Anyone tryed there slingshot wizard 105 with a single back strap? Found this on the web, is there even any mounting holes for this single strap on the 105? Seems like a really cool idea if the holes are already there? But can't find any pictures of the wizards with holes for this.

Never seen it. I wonder if they are using the foil mount to secure the footstrap in some way.

I am considering making a bridge that connects the left and right mounting holes and attach the center strap to it.
The challenge I see is getting to the foil mount bolts. The bridge would have to be curved to provide access to the foil mount.

this is how i did it. Works a treat. Got a bit of ali flat bar at Bunnings easy to remove, just 4 screws