I'm just finishing off my cage & the msa book was a great help, well worth a read.
Tube requirements are all specified in both CDS & cromolly with diagrams.
I bought my material from Houser race cars & they could'nt have been more helpfull
![Cool](http://cal-look.no/lounge/Smileys/default/cool.gif)
Cheers,
Kev