The module I got was single mode R2, and I am not sure if this is authentic or not. I saw "solarforce" engraved arrounds the reflector in some pics of authentic solarforce modules, but mine does not have it. Instead of that, there is thin sticker that has "Solar Force" on it. It appreantly is deemer than DX 11868 R2 module, and the DX module spec said it is 170~220 lumens. So, there is no way for it to be 300 lumens as they claimed. I never belived it anyway.
The build quality of solarforce module I got is fine. It came with white round emitter board, no excessive white gooey stuff beneath the emitter board. The DX R2 module came with black clover looking emitter board, and excessive amount of white thingy. If you think your module is a fake, please upload a pic or two, so that we can see and talk about it.
Except that module in question, the body of the flash itself was quite nice and smooth. The real value of solarforce is its body as a p60 host, and I have no problem with that point of view. This is one real nice p60 host.