[Grubby]

Out of the ERA manual for the Jag based rear - "The ride height will change roughly equal to the collar height change."

So if you put a 1/2" spacer in all 4 shocks, you should get a 1/2" ride height increase.

I don't see any reason a small spacer would not fit if you used a proper spring compressor. 1/2" is pretty thick.

John