Simply two pieces pf RHS, one 50x50x3mm - approx 350mm long, piece of RHS 40x40x3mm approx 80mm long, end caps, grinder and drill, and some grease.
I still have to make a mud/dust cover so it doesn't fill up with mud and dust. Which is normally what a mud and dust cover keeps out.
(i'm so proud of myself i had to show someone - missus wasn't all that stoked about it..
