Marcus, nice fab work on all the frame bits and brackets! On your copper spoon, here's one made from copper pipe that permits hands free operation, may help out...
I had some rare earth magnets so I used one along with some flattened copper pipe. Note the magnet is ever so slightly raised to insure the copper is pulled good and snug to the panel..
Each use will tend to leave the copper soot covered, so I used a welding brush to clean the copper between each weld.