I know, I know, I know... it just annoys me that in this day and age Our Friends In Aviation House take such a dim view of electronic ones.
(I have to admit that I can do a TAS/GS/WCA problem quicker using a CRP 5 than with a Jepp FlightStar. However the formula you gave me for Excel in the spreadsheet I made is the quickest way for me to produce Nav Logs)