Oh you must mean the 2019 circlip replacement on the needle. That took a little longer than the float replacement, but it was also a pretty simple fix of something that wasn't actually broken, at least for me (pic attached). Those are about the diameter of a pencil eraser.
Rear panel for M-16/912iS, final version.
and 80mm Kanardia HORIS Slave:
In between of those two will be a space for iPad with Garmin Pilot App, connected via bluetooth to Garmin GDL50 for ADS-B In and weather.
Mine are in ºC and bar also.
I think Celsius makes more sense – to me – at higher temps (numbers approaching and above 100ºC)... it's easy to compare to the boiling point of water.
A bar is about 1 atmosphere... simple. Who has a column of mercury anymore? Anyway, it's easy to remember one bar/atmosphere is around 30 inches of mercury (sea level). I use bars for scuba too.
We actually have a barometer comprising a column of mercury at my home airport. It's an antique. No one ever looks at it.