I see the DIY guide was useful to Votart only, but you should take a look at mi2's solution, he never ceases to surprise us with some new structures
is taken by rob, $7830, a simple light version of mi2 launcher.
markmadras with a remarkable $7894..
Have fun in AR2, I might join in a little later when I get some free time (oh school ) + I need to reinstall.