I just took a looksee at this fortress area, the tower is 5 tiles away and it needs to be 4 so atm it is unbridgable. there is a dirt patch 2 tiles away and there is a 50/50 chance it may block placement if the tower foundation is on it, test is down so I cant confirm yet if it does or doesn't. The way this fortress is placed, has the potential to be one of the biggest houses on the server with a tower bridged off each corner... and I am thinking of taking on the chellenge