Preparations for Caving Photography Holiday

I've been very busy these past few months preparing for my Summer holiday trip to photograph parts of the Felix Trombe cave system in the French Pyrenees. Most of the work has been in creating laminated maps for underground and entrance location, but I have also been building slave units (using kits from David Gibson: Caving Flashgun Slave) and converting Metz hammerhead flashguns to run off high capacity NiHM batteries. I have 4 flashguns with slaves, plus a couple of smaller guns for smaller places. I hope to have some pictures to post here in September.