I bought one from SRM a couple of months ago, went in fine but the release was far too high to my mind, it opened at 70 to 80 psi, my old one opened at 50, which I consider perfectly adequate. As per all the earlier discussions, if the valve is not opening, ie when the engine gets hot and oil thins, then the cam gets less oil. From my perspective let it stay open a little longer while the oil warms up and keep to the original valve.
Regards
Nigel