We all are
suckers attracted to cheap test equipment and fixtures. Recently we needed to measure a large quantity of SMD and acquired a TH2830 LCR meter and TH26009B Tweezers to do so. This setup combo worked well but took some time to complete.
Later when we needed to again measure and characterize a large quantity of SMD, decided to get a proper SMD fixture. Rather than get the quality Tonghui SMD fixture we opted for a cheaper clone since if this didn't work well, we could always fall back and utilized the TH26009B tweezers and pay the time price. Since these needed to be very accurate we wanted to compare to the KS34465A for the resistors, and did so but this required using a set of Kelvin tweezers with the DMM.
Didn't find any SMD fixtures like those for the LCR meters that would directly work with the DMM, so we thought about modifying the SMD fixture to work with a DMM. This would require adding SMD fixture connector, cable and a few Banana jacks. To verify that this would work we opened the SMD fixture to check the wiring a spacing for the connector.
We found the SMD fixture had the cases painted after the machining and the fixture holders, rear cover and other parts were not grounded!! Luckily the main U frame was grounded thru the 4 BNC connectors back to the instrument, but nothing else was

We ended up clearing all the mounting holes with a drill to remove the paint around the holes and also added 2 ground leads internally to attach to the rear lid mount.
Honestly I'm surprised we were able to get repeatable capacitance readings with everything floating around

Anyway, we've ordered another different type SMD fixture and will decide which to modify when it arrives.
Best,
Edit: Added image per request. Also the readings seem more stable, which would make sense with the fixture properly grounded.