Doing a valve check today and thought I would make up a sheet for figuring and one to keep for reference for the next scheduled interval... Use one sheet to write down the current lash in top of corresponding circle. When you pull the shims write down the shim thickness in bottom of circle, etc.,etc.
Use sheet to figure new shim size and write down on second sheet. After cam installs write down new lashes in corresponding circles and put sheet away for future reference.
Just thought some of you might like to copy this pic or if you would like a PDF of the sheet just PM me and I can Email one to you.
(I know it is a crude CAD drawing, but it aint no F'ing piano!!)