The keycap puller was working great until 2 year old got ahold of it. The hot glue was no match for her… Fortunately I rebuilt it even stronger. This time I took a keycap puller and cut out a cylinder of plastic using the Dremel until it just barely squeezed inside the screwdriver handle. Then used pliers and pressure to push it down securing it in place. Finished it off with a piece of heat shrink. This set of keycap puller wires also needed to be polished so they slid over the keycaps smoothly (another case for the Dremel and some left over diamond polish). It is rock solid now and looks better than v1.
Unfortunately I didn’t have any handles that were tshaped lol. But anything you can drill into will work 
Trying not to do this but I will be ordering a few more handles soon lol.
Random thought there could be something on the wirepuller to eject a keycap that way you can go down a board super quick taking all the keys off. I tried a bunch of thing but couldn’t find anything that would work just right. Going in a different direction I added a piece of plastic that allows ejecting the keycaps by pushing it to open up the wires and drop out the keycaps. It works and is a one hand operation but I am not sure if this is a real “problem” or not.