+1. I’ve standardized on 3 thumb keys per hand across all my keyboards.

SliceMK has an ErgoDox variant that is wireless and low-profile using choc v1 switches. Disclaimer: I’ve been daily-driving one of their ErgoDox Wireless Lite keyboards for about 9 months. But I like the ErgoDox physical layout – been using one on a nearly daily basis for the past 9 years.

A quick duck search pointed me at https://toolsweek.com/how-to-test-a-diode-with-a-multimeter/ . It’s been a long time since I needed to test diodes, but the instructions seem to match what I’ve done before.