Nice one Dean for documenting your findings. People are so quick to not bother these days. Adam and Colin no doubt know a lot more than me, but from what I've read from tuning books, Springs are not necessarily for everyone. It sounds like you might be in the know more than I but for anyone in the future thinking of building a 250 Bhp spec Starlet I think it's worth noting that actually, Uprated valve springs can add additional wear to the other components inside the engine and unless you need to be raising the RPM limit, are unlikely to be of much benefit. Or at least that was my inte