Hi Richie,
My four year old Col de Dame Gris grows like a shrub. Not sure why yours have only have one trunk. I might take a cutting here and there but this year without any pruning is the first time I see a couple of dozen figs. I'm reluctant to heavily prune it, and letting it do what it needs to do since it's in ground.
Edit : It's one crop and ripens very late in fall.