My Dart Swinger Project!

Looking better every time. Definitely widen that V notch to 90° all the way around like the blue lines in my pix. Clean out all the oil in the tube halves with some lacquer thinner and clean paper towels. Slow circles to make the puddle. You will get there. If you have to do multiple passes to fill it, no problem, just wire wheel off the flux core crusties before your next pass.