TIP 1

choose a plane that has a cannon, then go to the XML editor (Overload). Next, change:

• flashSpace ------ Local

  TO:

• flashSpace ------ World

TIP 2

in the XML editor, Diameter is the Caliber of the cannon.
change it into:
diameter ------ 0.15
you'll get a 75mm cannon.

TIP 3

The tip of the cannon base, where the cannon base length ends, is where the projectile fires, keep this in mind if you stuff the boomstick into a fuselage.

That is all.