Is there a way of customizing the toolbar [changing position of icons etc.]?

Welcome to ChromePlugins

not at the moment;

I read somewhere (can't remember where) that if you disable all your extensions then re-enable them in the sequence you want them to appear in that will do what you want ...

Have to be honest it doesn't bother me (so haven't tried it), as long as they work what the heck !

Would have thought the only problem with this is when they are updated the sequence may change ...