Kortex KT26 - Recapped for Vertical Collapse -Now Horizontal Image stretched

[Rom]

Cabinet had been in storage for a few years so when I got a chance to turn iy on was happy to see it still working. Sadly after an about an hour of gaming the image collapsed. This is the second time this has happened, the first time was about 14 years ago just after I had finished building the cabinet. 
I sent it off to be recapped on on return connected it all up turned the machine on and found the bios information was stretched on the horizontal (I'm running an old AGP Arcade VGA board).
I've adjusted the horizontal pot on the chassis to it's max (it's working as I can go the other way and stretched the horizontal even more. I've even tried switching the Cable from Wide to Narrow which was very minor improvement but my image is just that bit too wide for my liking.
It's playable but in some games text is cut off on the right of the screen which is going to be this little nagging thing that I'm always going to notice.
Is there a possibility that the recapping has done this and a wrong cap used? I noticed that the Capacitor in the top right is nothing like what there was before (previously it was Medium size and tall. Now it's short and fat) I now nothing about this side of things so excuse my ignorance. Suggestions welcome.

I've included a two pics one of a screen shot from a game that I displayed to show how much is missing. I know.. not much but games like Rally X I'm missing part of the map.

[Zebidee]

I'd start by asking whomever did the recapping for you. I'd be particularly interested to know if they replaced any of the "brownie" film capacitors near the yoke connectors - these directly influence screen width. They are usually brown and look a bit like little pillows or lollies. They rarely wear out and usually you wouldn't change these with a typical recapping (normally you'd only do the electrolytic caps routinely), but who knows maybe they "gave you your money's worth" and did every cap. Capacitors can vary in performance by up to 20% up or down (depends upon the cap specs), so keep this in mind even if they replaced with exactly the same value cap.

Recapping by itself might not solve whatever other problems you have going on with the monitor.