SteNova said:

and use a magnet to hold the circle in while your welding it

Click to expand...

I've bought an adjustable magnet from Machine Mart as well as a grit gun so hopefully should have it covered. There was a 20% off Sunday and I was allowed to go on a spending spree

As for thickness, different threads are saying to use 2mm, 2.5mm or 3mm. So as I'll be welding around the suspension I was going to go for 2.5mm. Strictly sitting on the fence for me....