For some reason, I found myself with more Foundry Crewmen than cannons. I took advantage of Wargames Factory's Christmas sale to also pick up one of the WSS Cannon sets. The cannons work well for the period and assemble quickly.
The other two crewmen are here temporarily serving a standard gun My plan is to scratch build a pair of Handbuchse guns to serve as "Artillery C"
I haven't come up with a plan for the original WSS gun crew from the kit, so I suppose they will go into the bits box, until something comes up.