Update - I ran a couple more iterations and I think this is as good as it gets for now. They will require a hammer and a flat screwdriver to install the Allen wrenches into the handles though. I just started them by hand and then used the screwdriver to focus the hammer blows on the wrench with a few taps on each side, working the wrenches into the handles bit by bit. It's not that hard, but not ideal. Still they are nice and tight when installed and are otherwise exactly what I was hoping for. I will post them later this week, and update this post with a link. I plan to release them as part of the A1/A1 Mini Spares Case, and as a separate design as well.
Update 2 - I have a few minutes, so I updated the models on the A1/A1 Mini Spares Case. You ca find them in the 3mf profile for the case (a1_spares_case_Ver1-6_rev9G.3mf). I will post them seprately as well later.