Waldo, Thanks for the nice words.
I used 5/16 inch line for the gas, which was the same size of the original line. I used 1/4 inch for the vacuum lines.
I did use flare fittings. I made the flares with one of those inexpensive flaring tools. I practised three or four times on a piece of tubing until I got the hang of it. I mounted the tool in a vice. Making a good 90 cut is critical, and de-burring and bevelling the tube before making the flare is also very important.
Kurt