I think, that when you use ordinary blind nuts there is no real risk. I have full-length dural inserts in engine bearers and after a season of flying the screws really are stuck, regardless the proper oiling.
Allen keys are one of those things that buying quality tools makes the life easier, thus PB Swiss. L
Right - I am using the wood to apply the preload, not attempting to stretch the screws themselves for preload. That means I don't need as much torque, which means a ball driver is plenty good enough. I might add, I have never broken one, not even the .050 size.
For solid connections (like headers) you count on the stretch of the screw to apply the preload, in that case, I use conventional Allen hex keys in the conventional manner.
I have had no issue at all with Bondhus drivers, which are commonly available and inexpensive. I have had some issues with various off-brand drivers rounding themselves out. On a few of these I cut off the ends and heat-treated it, no good, the steel was just not good enough
By the way, I have been hearing about this for 50+ years - what the hell is "Dural" (Duralumin)? Near as I can tell it is something like 2024, but only in European sources do I ever hear the word "dural" and I have never found anyone who could explain what it was, other than it is aluminum/copper like 2xxx series.
Brett