Questions for Anyone with a Roxon Mini FLEX Companion – 4mm Bits

I really love the idea of having the Roxon Mini FLEX Companion for days when I can't have my bladed Oknife U1 Pro because they both have 4mm driver adapters and I'd like to keep a small set of bits in my EDC kit. But I'm struggling to find much information on bit compatibility with the Roxon. They have their own set of single-ended bits that I know would fit, but I'd love to get double-ended bits for space saving. Has anyone tested the Oknife Double-Ended Bit Set or the bits from the Sharden Precision Screwdriver in the Roxon Mini? Any other double-ended 4mm bits you've had success with like the Victorinox Cybertool Bits or similar?