Is the slic3r config you posted for the mpcnc a decent starting point for the mp3dp? asides from leaving in the axis homing (since you strip it for the mpcnc having no end=stops). I am trying to make things as easy as possible for my friends here at work who im building for and these settings look to be on the decent side as far as speeds go. I am sure it can handle 10mm a second more or so but it should be a decent starting point right? Or do you have a different config entirely.