Being used to cad software that needs several clicks to get to a dialog you want, I didn't really notice, now that it's been mentioned I've always set up icons in the other cad apps for the dialogs I use often, but they're set up to create icons for what ever function you want, very easily, I know MoI will be able to do this one day :)
So Maybe a couple of small icons, one for edit, one for add in place of the arrow would do the trick.

One other thing that I found weird while playing around with styles is if I double right click a style colour, Internet Explorer launches.

And PaQ, nice job on using Moi's styles for visual presentation on that model, it really looks great!

Cheers