I wish you well with your endevour.
On the subject of tools to do the job I will regail you with something I or my work mates just could not understand.
iIn the 1970 when I was working for a research organiseation we had ordered a new PerkinElmer Atomic Absorption spectrometer which was duly delevered in a special packing case from the USA. We looked at this box and cauldnt quite see how one was supposed to gain entry so we left it for the engineer to open. He duly arrived and produce a 2ft long special driver to fit through the top of the box and unscrew the fixing screws. When the box lid was removed he showed us that inside was the very same driver and he said that he and others could not explain why it was inside the box. I still have that driver and in 30years I have never found a thing that it will fit.
On the allen ket front may I sugest that you invest in some T-handle keys, they will come in very handy.

Peter