No need for a fortress gate, DD, but you might consider reinforcing the roof to protect the structure against assault from above by flying orbs of space-age plastic! I'm thinking of an extra long double fuse for the late 1700s Petard that we will be bringing so we WILL NOT be hoisted! Instead of the traditional gate shot, I am considering a "corner shot" at 45 degrees. Because these ancient devices use no missile, this angular attack should not be any less safe than a cloud of cannon balls impacting the front of this outpost of the Evil Empire.
M&T