Hi, I have a Duet 2 Wifi board on my custom 3D printer and now I would like to add some extra motors (I am already using all drivers). What is the cheapest option to avoid buying a new board since this works very well and I'm happy with it. So far I found there is a mini expansion board, but it only works for Duet 3:
https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Expansion_Mini_2+

However, the manual says "It may be possible to use it with other mainboards, but this is not supported". Does anyone have any experience with connecting this to a Duet 2 Wifi board or is it complete nonsense?

Many thanks!
Michael