I have a 8.9" tablet and a 11.6" convertable. The 8.9 is closer to 4:3, but it is still too little to use as a touch pad. Then I got the 11.6 and it is not much taller than the 8.9. It may work for UCCNC, as the screen is not as cluttered as Mach.

I don't know if there is a standard, but it looks like the odd ending numbers are 4:3 and the even ones are 16:9 (or So). My $100 Insignia has one USB C port and in the base it has 2 standard USB ports.

I have not put them to use yet.

dezsoe What do you mean, " because wifi is unuseable in practice" ?

Don