I'll have to check that shape to be sure, but it has probably been replaced with 97 compound - and is a lot better for IT than 90.

I should have been more clear with my question on the prop valve, what I meant was which circuit is it in? All it really does is limit pressure (while also causing some pretty nasty hysteresis). So if you don't have enough rear brake now, you don't want to add one to that circuit. And it's not a good idea to have one in the front circuit either.

Grafton