Replaced the bonnet struts on the weekend ($48/pr Gas Strut Guys) as they were only just holding the bonnet up and becoming dangerous.
Was about to chuck the old ones away and wondered how they compared to the lift glass ones and it turns out they are very similar in dimensions.
The lift glass ones were at the stage that when I popped the handle the glass would not rise without a little help so they were probably on the way out too so I replaced them with the old bonnet ones.
Now the lift glass pops like it should and the bonnet's not going to dong me on the head.
(Apologies if my 'discovery' has been documented here before.
)
Cheers B