Anyone else had the spring that counterbalances the X axis on the HL1 break?

We have a ten years old HL1 Big Bore that has done quite a bit of work, something like 580,000 tool changes. Today the spring broke with quite a bang. The break is in the middle and the top half of the spring rebounded and bent the 3/8" bolt that I think must have been intended to act as a keeper on the spring mount then bent the enclosure.

Now I guess my problem is figuring out how to stretch the replacement spring to install it when we get it delivered.

Incidentally if this ever happens to you don't hit Estop, hit feedhold. I was near the machine and hit Estop when I heard the bang. This turned off the servo power and the X axis dropped down to maximum travel. Fortunately the turret was clear of the chuck and part so nothing happened.