Good luck.

Also, scent glands don't really impact their body odor if you remove them or not.
The scent glands are like a skunks. The ferret with glands can 'poof' when they are excited or frightened. But it's more of a fart that will dissipate within a few minutes. So when you descent a ferret, the only thing you are getting rid of is their ability to 'poof'.