I did my 600 Mile Service this weekend and noticed that three of my intakes were too tight. So after figuring out the needed shims, I created a spreadsheet ;-) I created it originally on Office 2007 for a PC and tweaked it on Office 2011 for Mac, either version will work with the file though. I even copied the shim parts listing off the web and added a lookup sheet. All you have to do is enter the gap and then the actual shim size (if necessary), the spreadsheet will do the rest of the work. <a href="http://www.flickr.com/photos/gsansoucie/5548998894/" title="Camhead Valve Shim Spreadsheet by DamnBeavers, on Flickr"><img src="http://farm6.static.flickr.com/5107/5548998894_da20d7b4bb.jpg" width="500" height="194" alt="Camhead Valve Shim Spreadsheet" /></a> I think I have uploaded the spreadsheet to: Try this Link. << Should work now! If that doesn't work, just ping me and I can send it to you via email (or I can try to figure out the comcast website management). Curent version is v.10 (Can see in Properties).