If modding your 3D printer is in your future you may want to nab these easy to print tools. Using a common 6mm by 1mm magnet, they hold a T-Nut in place as you slide it through your 2020 or 2040 extruded aluminum. They also lock themselves in place once you've got them located so you can go find your screwdriver again. They're easy to print so I made four sizes to use depending on how far you have to sneak a T-Nut. Squeeze the tabs to slide, release to lock.
I've seen lot of really good bracing made for my 3D printer yet every picture I see shows them with only a single screw used. This makes setting T-Nuts ridiculously easy.
I print these in ABS with a skirt. My printer currently sounds like a nest full of hungry baby birds as I'm waiting on bearings, that's why my prints are so poor in the picture.