Several suggestions for various changes

I would say, since inventory kit is something linked only to sales, it would be better to have a new tool names for example production kit. Maybe with the possibility to create an inventory kit from a production kit and vice versa.

This have been promised by @lubos but it’s not an easy thing. If you know something about relational databases you know it’s almost impossible. I think that’s why it’s still in the ideas section

Easier but with the same issues of the above topic. Maybe with a two lines header or a XML notation inside the cell he can write both the key and the name. I support this idea.

Nice idea

I was thinking the same thing just a few days ago!

Also enable to have at least a few categories in the inline custom fields. Text, numeric and drop-down.