Compression figures after water in the engine

[AndyCook]

surely it will only be 10,11,12,13mm and maybe 14mm ones that are really needed? as these are the most likely to round off?

 

[andyw]

This set looks a lot cheaper http://www.directsupplyukltd.co.uk/products/metrinch-14-piece-combination-spanner-set-met-0125/263/