Re: The Name is "Nunya" (please don't call me "Nuny")
Here's what I do.
Springs are a band-aid and are NOT needed if your rear sprocket is centered correctly. I also have a thread with tips for this. I think it's in hubs and chains...(too lazy to search again)
If more is better, then too much is just enough.
If you can't afford it, build it yourself.