Hello BB,
I tried seeing how I could get a shifting spanner on the plate itself, but there was not enough room between the plate and the deck itself to gain leverage. It just wouldn't fit. I admit I was a little worried about the axle, but this time I got lucky with no damage done on either side. If someone could outline in more detail exactly where they place the (insert tool), and how they get sufficient leverage, I am all ears (or eyes in this case).
The wheels in this case were bent outwards away from the mower. If they were bent inwards, I could see how leverage could be gained.