Power cube button holder

I bought a Voltcraft power cube for my home electronics lab, and in order to set the precise voltage for the different modes, you have to hold down a button and twist a knob. It is a very fiddly operation, so I decided to print a gadget to hold the button down for me. :)
Please note that I still haven't attached the button holder permanently, it's just held in place with hook and loop fasteners, so that's why it isn't perfectly straight...