No i like what you say, always open to what others have to say, i have reused the valves and put them back in any old order, reason for this is my bench calapsed,hence they all got muddled up, if like you say would happen then its not a big job to remove heads and start again, new vavls and guides ,as for end flote cracking and other mesuments are all fine,i do want to change the rockers but money is tight so see how we go,im of the oppinion that so long as the bottom end is ok then once the engin is in stuff like heads valves are a doddle to do in the car,