The big issues are firmware related , the shim is working fine for the majority ( I don't want to say that they shouldn't do it right ). And that little shield for buttons + modified protection in resistance mode won't change much .
Funny. I don't see the firmware being big issues. Certainly there are more firmware problems reported than hardware and they may be more visible to the average joe but I see getting a stable hardware platform as being a larger problem.
Seeing them change from the single dimple contact to double and now back to single. Looking at photos of the wear, I'm not convinced the meter will hold up. Dave did run a life test on some version of it but it seems odd they are changing the design if all is well. The same is true for the transient protection. If Dave is going to make a statement that the meter passed cert and that's the end of the story, then there should be no reason to change the front end. It's good to hear they continue to develop the hardware. I'm looking forward to seeing what they come up with.
Ok , you are very interested in testing the switch , and surviving XXX KV transients , that's your job or hobby ( or both ) , and it's fine , but what hardware issues that we know are important for an average customer that will buy this meter ?
The shim is working fine , the 2 diodes 1N4007 are leaky and temperature dependent but affect mostly 50Mohm range .
I made a shield for membrane buttons as in David's picture , so far it is still sensitive to touching that zone , I will test more .
Firmware bugs are numerous , from slow autorange , missing features , etc , maybe someone should compile a list .
To make a good and efficient firmware , not just working , needs money ( a team , not one or two people working in spare time
) , skill and will .