I was wondering if anyone knew, if the new micro pave setting from Dirtcheap (E-1),with the round pave diamonds, that encircle the round stone, can accomodate a 3ct center stone? Would this be too top heavy for a 3ct center? Also, this might be a weird question but do they consider trade ups on mountings. I have a 12grm platinum mounting very high quality similar to Scott Kay, with no diamonds. I would love to get reasonable credit, towards a different mounting. Any suggestions?