Check Upright z-actuator mount height

The Upright Microscope z-spacer for the upright z-axis appears to be 2mm too high, from two different bugs:

1mm too short from: module upright_z_spacer_base(params) has translate([0,0,-62]){ , which does not place it on z=0. it should be translate([0,0,-illumination_dovetail_z(params)]){. This is 63mm

3mm too tall from: module upright_z_spacer_top(params) which has

translate(right_illumination_screw_pos(params)){
        cylinder(r=6,h=3);
}

which makes the top of this top part at illumination_dovetail_z(params) + 3

function upright_z_spacer_height(params, upright_sample_thickness) defines the total height correctly as twice the distance from the stage to the illumination mount, plus the sample thickness.