I have just the Makita planer. I make a pencil line (scribe line) on the outside of the jamb so I can see it. I then set the planer to where it just bites the wood... and use it like a hand plane of old making several passes...I do nick the drywall but sheetrock 20 meant for trim carpenters... I don't know if the planer you mention is the bigger or smaller one, but I would think the smaller one would be easier to handle, but the bigger one would work.