I am currantly trying to build a model of the cooper river bridge. At the moment I am working on the piers that hold up the fixed part of the bridge. They have a base with a colum on each side than a top were the road deck is atached. I am constructing it all from evergreen styrene. On the base I have simply found center of colum and drilled a hole to fit that piece. The problem I am having is keeping everything straight. The colums are perfectly centered and are paralel, but one will be kicked to the side and the other not. Does anyone know of a way to do this were the colums will be level and plumb. It has to look perfect! The bases and tops are hollow, top bottom and sides, glued with super glue. Would it work better if top and bottom were solid styrene. If so I no doubt woud have to have a perfectly drilled hole or it would end up worse.