When someone talks about upgrading a Bensen style Gyro to a redundant mast, are they speaking of two 1x2 .125 wall tubes sandwiched vs a 2x2 mast? I am very new to gyros and appreciate any feedback. I have not purchased or started building a chassis at this time. I know there are much more advanced designs than the bensen but, I cant get past the nostalgic appeal of those machines. I have to believe there are many people who have enjoyed many trouble free hours in these machines despite their reputation as being dangerous. Plus I need to find a use for the 4318 Mac that I just purchased. Thank's : Justin.