If it is ONLY the passenger side window, I would check if the problem isn't with the switch. Swap the switches of both windows and see if it's now the driver side window acting up.
I do tend to drive spirited anyway, but the (busy) station I used had me wait so long that I'm sure things cooled down again. It's worth a try to find a station that will allow a test straight after an Italian tuneup I suppose.
Still interested in hearing about good cats though.
Are there any particular catalytic converters that are reliably passing MOT and are readily available for a reasonable price?
I'm asking as my MGF MK1 is having difficulties passing the emissions test, and I know I have been driving around with a dodgy lambda sensor (that I've since replaced), so I suspect the cat got damaged by a fuel mixture that was too rich.
Any links to sellers, Ebay listings etc are much appreciated.