|Make the tower (house or whatever..I´ve tested it and it works for all rectangular buildings) measure from each opposing corner and make a cross shaped insert.|
|Mark a point at the wished height in the middle of the cross piece. Make a mark at the height of the wall and join the two up. Repeat for all 4 sides.|
Welcome to Andy from Cold War Gamer blog . Everything cold war period but in 20mm and a huge amount of resource links.
PS; Due to the screw up with the Bloggroll list thingy, I couldn´t go through the horror of deleting ang re-doing the thing so I´ve just added a second one..much easier :-D