Here is my entry for the Technological Advancement. Behold the great Scotch Bombard Mons Leg. Built in the 15th century and presented as a gift to King Jameson VI this weapon can decimate castle walls and turrets, though it takes all day to load and fire more then a handful of times. Of course the explosion of the charge is enough to make some surrender.
It's Mons Meg though (not Mons Leg), and just to be nitpicky it's a Flemish gun, the Scots couldn't make something like this on their own account, they just borrowed it and never gave it back
The real bombard was made named Mons Meg and was made by the Flemish and given to the Scots as a gift to king James IV (Might be wrong number). I thought a Lego version would be cool, but thought it didn't look look right calling it "Mons Leg(o)". as it is a MOC inspired by I had to change some names and naming the king after my favorite whiskey and the nation after is best export seemed like I couldn't resist.