I'm a big tech/pc geek, but I know little to nothing about arcade monitors. I know the NNC used a tri-sync 27" tube, which I haven't had any luck finding. But I did find a couple of potential candidates that I'd like to look at this weekend when I'm in Chicago. The First is a Happ SE-M23V29, and the second is a 27"...Sony-RG KTMF? Both appear to be in good working condition, with the Sony only having 80 hours on it supposedly. Anyone know if either of these are tri-sync or would even fit in a NNC?