We have Andersen casement windows and we open them frequently. I'd like to create some kind of fitting to fasten to the post so that, after I take off my T-handle, I can use a cordless screwdriver (with a nut-driver bit?) to open and close the windows.
Any ideas on where to buy -or- how to make a fitting?
I would not modify the existing post. That way you can to put back the original handle if you want to in the future. Instead, I would add something onto it, such as a deep well socket that fits over it. Maybe you can find a 12-point socket that will fit it.