Sounds like a good plan, but be careful about replacing springs. I've found that springs, like coils, don't often go bad or weaken unless they've been damaged somehow. If you can find part numbers and exact replacements that's fine but swapping in something that looks similar may introduce mechanical issues that would be hard to diagnose later. Springs are selected based on the strength of the coils they're working against and messing with that balance can be problematic. If a spring doesn't seem to be doing its job it's more often than not due to an issue elsewhere having to do with friction, dirt, grime, wear, etc. which should be addressed first.

/Mark