I suppose it needs to be more universal. A product like this just for JK/JL may never turn a profit.No I haven’t. The problem we face is that for any given capacity we have to have a certain number of cells. And as I am typing I am thinking that the only available cells are round. Round cells no not package very efficiently so we have a lot of air space. My wife is going to kill me but I think I just stumbled into another project.