I just bought a couple 500SE/DC7 regs. I really would like to put a 70degree adaptor on the LP hose end but they just will not fit through the plastic hose knob on the reg. Has anyone else succeeded at this. Did you trim off the little 'wings' from the knob to accommodate the angle. This seems like it would be a common adaption to the straight hose attachment, so I am surprised that the knob was designed the way it was.