I'm sure this is a familiar story, but I have some specific questions related to my own particular needs so thought I could get away with a separate thread. I bought a GX7 on a whim three months ago - since then I haven't touched my DSLR and I have built up a good M43 lens collection that suits my needs for 95% of my photography. I have a Nikon d7100 with 35mm f1.8, 50mm f1.8, 18-140mm, 70-300mm VC which I think are going up for sale. What is preventing me doing so is speedlights and flash commanders. I have two third party speedlights that fully integrate with the Nikon CLS system, preventing the need for other controlling devices, and its a set-up that is familiar and reliable. I also use manual radio triggers where needed. So, the key question: What flash controllers exist for M43, preferably not optical, that I can use in a home studio set up for product and portrait photography? What speedlights integrate with these systems? I have various modifiers that I intend to keep. Assuming I can find something to cover this area without spending too much cash, I can sell the Nikon gear and wait for the EM-1 ii (or get the GX8) as a working camera, with the GX7 as my walk-around. I really want to move away from two lens systems.