Why not just get a cheap beam type - they're much more accurate, rugged and do not ever need to be calibrated - you calibrate it by bending the pointer til it aligns with the zero on the scale.
Granted, the click-type are argueably more convenient and possibly more sexy.
I own both. The click-type is used in non-critical areas such as lugs and suspension, but any engine work that I do is always done with the beam-type for accuracy.
Cheers!
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