ABS force probe

I wanted to measure adhesion to my glass bed, so I made this small force probe, to figure out the force required to push it over.
Calibrate it on a milligram scale (pressing it down onto the scale with x-carriage/z-axis. Each 0.1mm step will give you a fairly reproducible increase in the pressure exerted by the probe as long as you don't give it time to relax. I got +/- 10% on repeated measurements.
Use the printer axes (I used the X-carriage) to move the small distances to generate force and bend the scale. To avoid the probe softening with the heat from the bed or extruder I kept it covered with aluminium foil when not in use.
Pushing my tower at 55mm above the base I got readings of around 0.5-1N using sugar/water/detergent coating on my glass bed (but very wide SD, so further control of coating factors is required). I haven't formally measured ABS applied to glass with ABS juice (acetone with dissolved ABS), but adhesion with this seems more consistent even without any real control of application thickness, so is on the to-do list.
See my post at http://forums.reprap.org/read.php?4,156005,216866#msg-216866 for more details.