The two redoubts are perfect for my Great Northern War infantry. However if I want to use them for the artillery I have the problem that the guns really sit a little too low to look right. As you can see:
So today I made some platforms, two roughly 1" square and two 1" x 2". They are two matchsticks high, which is just enough to rise the guns to a sensible height.
On the left is a wide platform, allowing me to deploy two guns in an artillery redoubt. The smaller platforms allow a single gun to support a three base infantry unit.
And here they are in use.