Thanks for this - I was being a dullard as I thought the space-bar wobble was a "feature".
However,
Further to this I discovered that you don't need to drill a hole. Take some dental floss - you know - the stuff that makes your gums bleed when you use it sometimes - and thread it down the stabilizer hole. As it is wound in a spall it will have a natural tendency to bend at the end. Loop around the stabilizing wire and use (fine nosed) tweezers to pull the end up. Make sure you have a good doubled up length for a good grip. Repeat with other stabilizer wire. Now, making sure the central spring is properly seated, push one end down, trying to angle/rotate it so the notch for the wire is angled open end down-ish (I think this helps...
) while gripping the dental floss, preventing the stabilizing wire from depressing. The natural flex of the plastic will allow it to clip into place. Repeat other end. Stabilized. Gently pull the dental floss out once happy.
The hole (te-he) process took me 5 minutes.
This may leave some dental floss wax in the well - but - oh well.
Hope this helps.