Shield maintenance at 4,500 rounds

[Troutscout]

I'm looking for opinions on maintaining my Shield...namely the springs. A few months ago, I had to replace a broken slide lock spring which got me thinking about the condition of all the rest of them. At 4,500 rounds, would you consider having all the springs replaced at once or is 4,500 rounds to early to worry about it?

 

[Cphobes]

The slide lock spring is in a bad spot. I've noticed mine comes out of the groove and wears. Had to replace it on my 9EZ as well. S&W sent me two for free so I'll charge it soon. Not sure about all the others, I'm only at 3k rounds thru mine.

Curious as to others experiences and recommendations.