I agree with Billy....We can all read the theory but there's nothing like seeing a worked example.

I spend a good proportion of my working life writing and checking calculations. Iam a confirmed Excel junkie but writing calcs using the equation editor is a pain. XLC softens the blow and not only assists in writing but also in checking.

I have been a member here for a while but haven't contributed a calc yet. What's stopping me?...well nothing physical I could probably knock one out without too much effort either..... It's just a matter of getting around to it.....

And that I think is th crux of it...I'm sure that many people want to contribute but just haven't got around to doing it (I will soon, I promise).

How to encourage people to do it?...Well that's another matter.....The only thing I can think of is to expand the forum and build the community. Perhaps steering the site toowards somewhere where people will come to get & give maths, engineering and science tips (preferably involving the exchange of XLC calculations through the repository) will do the trick.