I have a grid that is supposed to have a variable number of columns, which the user can change (a "dynamic" grid). This means 1) column model comes from the server and 2) I have to recreate the grid each time. Destroying the old grid doesn't get rid of the roweditor, perhaps because we have saved the grid config, and since (previously) we reuse the config, the roweditor gets reapplied, but to a different grid, causing errors. To solve that error, we have it recreate the editor every time. If it is efficient, I'd like to keep the roweditor, since I think it would lower the recreation time. Hopefully, your eyebrows aren't raised anymore.