Just wondering if anyone knows if these 3 passive lcds have similar menus and functionality and they all share similar logic boards? Some Technika sets are UMC made in Slovakia, Cello are uk assemblers and Mantra appears to be a polish brand doing the same. I doubt any of them do much of the design themselves instead they merely assemble kits from China. Thats an assumption on my part I'll admit. Anyone have any concrete information about these sets?