adjust the tolerance for the stand mount inner radius for a better fit

TinySpHEAR_common.scad

@@ -79,7 +79,7 @@ mic_wire_hole_offset = 5;
 // measured diameter = 13.5, inside diameter of sleeve = 13.79 (
 mic_mount_radius = 13.50 / 2;
 // add this to inside diameter
-mic_mount_fit = 0.1;
+mic_mount_fit = 0.2;
 mic_mount_slot_height = 11.5;
 mic_mount_slot_width = 4.25;
 mic_mount_slot_radius = 6.25  / 2;