[Raapys]

As it stands, I'd say the whole slot thingy is completely unnecessary and just make for more tedious designing; there's enough slots for 'anything' anyway, so why bother with it at all? It basically just make you place the components instead of simply clicking them. More work, same goal achived.

It could be made to actually serve a purpose following some of the suggestions here, but that would probably be too much work for little gain.