No, I've never owned an MG, although, actually I did have an Austin Healey 'Spridget' once .
My last car was a BMW 325 compact, which is a tad heavy to drive, but not too bad. I've only had the Zed for a couple of weeks, so just getting used to it. In my defence my drive to work is a very very winding country road
Have you played with the seat. I can't help thinking it's a position issue if there is nothing mechanical.