Well guys, had to remake the 8 way digital unit as it was too big to go through the back of the master controller with the tact button pins out the back, it is small, 24mm diameter, as you see in the pics, i've had to sand down the corners of the tact switches to make it fit. Decided to use a d-pad circle instead of a joystick, and fortunately, I had one that fitted perfectly, a nice bit of luck.
As usual, I share all my knowledge for others to use and benefit from:Steps:
*Cut out a piece of perspex to the size of the d-pad circle.
* Made a hole in the centre of the perspex through was glued a pointed plastic bead with a hole in the middle; married them up so a thin wire can go through, tied two knots in the wire, dremelled out the inside of the d-pad circle for the knot to fit through, glued in place.
* Sanded (with a sanding drum) the edges of the tact switches, and cut off the two pins on the short edge on one side as not needed.
* Hot glued the tacts in place, the grey ones are rubber topped tact switches so have a nice mushy feel, the blue ones are normal clicky tact switches with a raised shaft, which I can sand down to the level needed. The grey tacts were raised 2mm so the blue tacts (clicky ones) could work better as less cut off them.
* Hole in the base piece, this keeps the part in place with friction; i'll introduce a shaft/groove to do this better, later.
In this pic, a normal direction is pressed, the grey tact is depressed, the blue one isn't
and here, two grey tacts are depressed, ie a diagonal - the blue tact is also engaged and depressed.
I need to wire it up to test, and demonstrate it working fine, however it looks like I got this probably working first time...