The Flipside is an interesting model from Duncan but was not a popular one. Slightly undersized and light, it had a bearing seat that was reversible to standard bearing or size C bearing. By flipping the seat, either bearing could be used. And it came with both bearings, so it was very flexible.
44 Clash is an annual event in Japan promoting yo-yo freestyle. This Freehand Zero was released to commemorate the 5th Annual 44 Clash in 2012. Sometimes at events, side caps were sold separately or given away.