I was in a pinch when I couldn't find aluminum tubing anywhere near the correct size and I wasnt sure if copper would work or not, so I just took some thing straws and cut them to length. Since I knew they were not all that sturdy, I made sure they were flush with my washers and the washers were level and them applied a bit of hot glue to hold them in place. After I had them set in place and all aligned right, I picked up a few more APs, therefore, the alignment and spacing of the washers seems to be quite important. Hope that helped anyone.
