Something I haven't talked about is annealing the aluminum before you try to form it, so here goes.
-use a dirty acetylene only flame to put a layer of soot on the surface
-change the oxy-acet flame to a neutral flame and heat the entire piece until you make the soot disappear and reveal nice clean alum
-let the alum air cool, and it's annealed
![](//4.bp.blogspot.com/-MkaFVuosgoM/Tt4WZb5WwLI/AAAAAAAADcM/3XWZ0TnPpxg/s320/IMG_1596.JPG)
![](//3.bp.blogspot.com/-da9FLK90RWw/Tt4WYhFs_vI/AAAAAAAADcE/m_5r5bHpgwQ/s320/IMG_1597.JPG)
![](//2.bp.blogspot.com/-llUt9Y2opwg/Tt4WYX8ID4I/AAAAAAAADb0/QQ1ROshk27I/s320/IMG_1598.JPG)
![](//2.bp.blogspot.com/-nsWQOuuB7T0/Tt4Vy7q-AcI/AAAAAAAADbk/UOvM_TbG8zU/s320/IMG_1599.JPG)
I decided to hammer the back panel of the oilbag, so it's back to the buck.
![](//2.bp.blogspot.com/-dC898Dhw25M/Tt4VyUVQ_dI/AAAAAAAADbc/9_slqq00--8/s320/IMG_1593.JPG)
Fitted
![](//2.bp.blogspot.com/--s-n5hjAEwQ/Tt4VyDT94hI/AAAAAAAADbQ/P9Q_NG8tIuQ/s320/IMG_1601.JPG)
Welded
![](//3.bp.blogspot.com/-_1nQz7FeDS4/Tt4VxhlwuMI/AAAAAAAADbE/VDJF-e4ah6s/s320/IMG_1602.JPG)
Top mounts