"The competent programmer is fully aware of the strictly limited size of his own skull; therefore he approaches the programming task in full humility, and among other things he avoids clever tricks like the plague." – Edsger W. Dijkstra
In this sample I have developed a simple application which is using a CRUD store. I have used a separate form to change the data in the grid. It allowed me to implement “create new user at the base of existing one” feature.