This fix is designed to make the battlefield more dynamic by having cannons explode with every shot. At S5, the cannon has a 1/6 chance of wounding itself each time it shoots, more accurately representing the casting technology used to make Renaissance fire-arms. Its also a risk for engineers who stand too close to the cannon. As long as crew remain part of the profile their is no issue with killing off the crew.Each time the cannon fires, place the small template over the cannon. Everything underneath takes a strength 5 hit and all units within 6" must check for panic.
Each time the cannon misfires, place the large template over the cannon. Everything underneath takes d3 strength 10 hits, all units within 6" of the template must check for panic.
A cannon may never re-roll a misfire result.
The large template is designed to show the catastrophic outcome of a cannon failing. It will hurt nearby artillery as we as engineers. With the changes to re-rolling misfires, engineers probably wont die as much, but a cannon battery could go from fully operational to severely damaged in a single shot. With a chance to injure themselves with every shot, a 4 wound cannon would be hesitant to fire with 1 wound remaining.
It will make castling more hazardous as well.
What do you think?
I think I'm being too soft on cannons.
EDIT: special racial traits or items could allow for re-rolled misfires.