Your welcome, and yes it is nice and gratifying (and quite a bit scary) to have invented something that people start using after 45 minutes introduction.

In the beginning I thought it had to be a fluke, so I tested it more and more, pushing then envelope and finally asking customers to pay for a beta product.

They said "ok", which was even scarier, because now we had to deliver!

I found the problem when I stopped looking for it - I have been reading the zenhabits "letting go" book many times (six at last count) and part of finding something worthwhile to work on was stopping to search for "the thing"(tm) and start looking at what was around me.

When you stop forcing yourself to get an idea and start looking with an open mind and open eye you start noticing stuff that others do not, and perhaps you might even discover something that is right for you to spend some time on