I assumed that John had the correct picture. It's probably close enough to see what a long shot that it was that the block was the problem.

The philosophical rule that the simplest explanation is preferred over the more complicated one and that explanations should be first proposed in relation to concepts that are already known.

Another way of seeing it is to say that the fewer assumptions that need to be made to support an explanation of something, the better. The principle is attributed to William Occam of the fourteenth century.

From Occam's Razor. It admonishes us to choose from a set of otherwise equivalent models of a given phenomenon the simplest one. In any given model, Occam's razor helps us to "shave off" those concepts, variables or constructs that are not really needed to explain the phenomenon. By doing that, developing the model will become much easier, and there is less chance of introducing inconsistencies.

IE The master cylinder and then some less than successful bleeding. And, is it I that needs to be right or is it that I need to be wrong? I have only supported or disputed other peoples' theories so how could I be right? Or, at least, original and right????