Ok, so I'm afraid I've reversed my previous decision and ignored the advice and I've gone ahead and removed the base.
The reason for my change of mind, having decided to follow your advice yesterday, was that this evening when I got home there were signs of mold on the base and one of the root fragments which looked OK yesterday was black.
Yesterday I had left it resting over a pot of water (not touching the water at all) with a bag to keep in the moisture. Maybe I had not let it dry enough after a thorough spay of the roots just before that... not sure... but all that bottom section was looking sodden tonight and the signs of mold growth
really worried me.
I've used listerine afterwards, then rinsed it off, then used cinnomon as well. It's now resting over the pot of water but no bag over it... I'm going to keep a close eye on it's moisture levels.
Anyway, now I've done it! Too late to go back!
It may live, it may die
Sorry to ask advice and then ignore it. At least I knew before I made the decision that I
was going against all the advice.