Looking for a very light (< 350 grams with batteries), self-powered (by its own battery), optical slave flash. Highly prefer (manually) adjustable power output and low cost. Please kindly advise eBay search terms (brands/models). It will mostly be used for macrophotography, on one arm of a dual arm flexible (cold shoe) flash bracket. The arm can only hold 350 grams (with batteries loaded), after which if will bend under gravity. The other arm will hold my Olympus FL-LM3 flash, connect to my Olympus E-M10 II's hot shoe, via a TTL cable (Promaster Olympus 4225). The FL-LM3 will be TTL master flash. I used a Godox TT685o (full sized, TTL, HSS, 2.4Ghz) flash for macro before, but found it slightly too heavy and overkill for macro (though I like it for outdoor portraits). So this new quest is only for a very light weight macro flash and rig. I do not want to spend for a dedicated macro flash, such as Olympus STF-8. This photographer assembled a similar budget Canon macro rig, but I cannot clearly hear what speedlites he used: Is it a Minolta 118x flash and a certain model of Sunpak flash? I don't know what their loaded weights are, with batteries (if they can sit straight without bending my dual arm flexible flash bracket). Thank you very much.