start of an Aircraft Spruce order

this is for brake bridges and mitering/brazing practice...i have some Rivendell practice lugs that I don't know the exact tubing sizes for, so I'm hedging my bets by getting all 3 common sizes (25.4mm, 28.6mm, and 31.7mm), with more of the 2 sizes i'll actually be building with.

pulled from http://www.aircraftspruce.com/catalog/mepages/4130tubing_un1.php

2 ft. of 1/2" x .065" (~1.65 mm) @ $2.75/ft. = $5.50
2 ft. of 1" (25.4 mm) x .035" (~0.89 mm) @ $2.34/ft. = $4.68
6 ft. of 1-1/8" (28.6 mm) x .035" (~0.89 mm) @ $3.15/ft. = $18.90
6 ft. of 1-1/4" (31.7 mm) x .035" (~0.89 mm) @ $2.95/ft. = $17.70
3 ft. of 5/8" (~15.8 mm) x .028" (~0.71 mm) @ $2.75/ft. = $8.25
total = $55.03
total tubing weight: 7.029 lbs.

their 1/2" x .058" (~1.5 mm) is about 50¢ more expensive, even though it's slightly less steel. .058" is the size H. James sells for bridges, but I figure a little extra thickness can't hurt, and it's a little cheaper...why not?