Finished all the cuts I needed to make in the MDF base.

Instead of trying to cut the granite tile, I've recessed it into the back of the MDF.  This reduced my build area a little, but it's still 300mm so I'm happy enough with that.

Gave it a couple coats of primer and then some hammered paint.  MDF really soaks up paint.

Assembled the end effector.

I didn't use the groove mount.  I just threaded the push fitting through the inside of the end effector and screwed it on.

And I installed and wired up the homing switches.

Once the extruder mount is done printing, I'll finally be ready to assemble this thing.