Check and test the body from range of motion improvements

From !512 (merged):

Merge checklist:

• check range of xy motion is square
• check that the hole for the actuator lever into the actuator housing is not the end stop for the motion upwards
• check range of xy motion is 12x12mm
• check range of motion is centred on the neutral position
• check range of z motion, including the highest point for a short working distance x60 objective on a high resolution optics module and the low-cost optics.