I decided to use four extra welds along the edge to decrease the chance of failure while driving in the sun along the Normandy beaches
Than...cleaning up the welds and checking the chainwheel on the bike again.
Now......changing teeth! With a basic saw I removed the teeth from the chainwheels that came with the bike. I cleaned up the remains of the spokes from the "old" chainwheel and than used it as a template to draw onto the newly cut wheel. This way I knew where to cut it the teeth from the newly cut wheel. Then it was basically removing some material and testfitting....removing some more, testfitting again, until it fit perfectly. The last picture in this batch shows the pieces combined with a few welds.
Alex