X-Rite 810 calibration
I just purchased an X-Rite 810 off of eBay for use with verifying and monitoring processing with a Photo Therm Sidekick SK-8G I have coming in the mail. The X-Rite 810 I purchased doesn't come with the original reflection and transmission calibration standards. I am particularly desired to calibrate transmission for film measurements.
Is it possible that some apug member here in the US has one? How often do people calibrate their densitometers? Should I buy some other calibrated transmission wedge?