Nothing better to do again this-morning so grabbed a few tools and tried tidying up the tray. Finished welding and smoothed as good as I could with the grinder, which was a little awkward being as it was a 9inch grinder I use on my car.
You can probably make out from this photo the bit that has warped, got a little carried away with the welder. Bent it back ok with the pliers after and the IO plate fits nice and snug as it should.
One problem I had once I had finsihed with welding was the amount of heavy penetration which went through into an awkward spot, which I found difficult to tidy. My solution, car body filler!!
Almost there, but still not perfect.