I may be selling a fully working neotec 25" med res board if you're interested. I capped it and everything is nice... just dont have a use for it anymore.
I can give you pics of it working with NFL Blitz. It will come complete (Chassis, neckboard, remote and yoke)... so it should be able to go right on your 7500 tube without issue. Will require you to do real basic convergence... but it's not too hard. You'll have to pull the entire monitor out or use a big mirror to see what you're doing.
let me know else ill probably put it on ebay later this week.
-s