I got the second micropad in today, and was successful using it to switch ports on the KVM. Its a 4-button unit, so would fit well with the 4-port KVM models I think. Software to program it was more intuitive than the Ecarke, but the form factor of the Ecarke was a better fit for my situation. Oh well, I’m happy I pretty much have everything working as expected: Razer keyboard and mouse, 2K monitor, sharing of webcam and headphones, and hotkey switching.
The model micropad that worked for me: https://www.amazon.com/gp/product/B09TBBR8RR/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Thanks,
–Jamie