Recommend an Angle Grinder

[Danny Wideboy]

We've never managed to kill the 4.5" Makita's, there's one down the workshop that's 15+ years old!

The new ones just aren't as good. I've seen many fail at young ages.
Yours sounds like a good one from the old days.
Hitachi also make decent grinders, or used to. I don't have any experience of a new one but I have an ancient 4" and used plenty of 9" ones at work.