Freesat from Sky with Humax Foxsat HDR

Following on from my previous post on Freeview vs. Freesat vs. Freesat from Sky - Channel Smackdown I thought I ought to post some more information on what your options are in you've already switched from Sky to Freesat and paid out the cash for a new box. In my case the Humax Foxsat HDR.

Can I get Freesat from Sky using my Humax box?

According to Humax: "Yes; your sky card can be used in the Humax Foxsat HDR CI Module slot. This can be bought separately. This will give you give you Channel 4, Five, Five Life, Five US and Sky 3." But there issues, lots of them, see below....