I plan on tack welding the elements in situ. My welding is not good enough to finish weld in situ [some areas are not possible anyways due to burn risk], so I plan on removing the tacked struts and taking them to a TIG buddy. As I understand it, I am going to have some movement. The Manual suggests that bolting the box section to angle iron will help during welding. I was thinking of being more elaborate and weld me a angle iron 'cage' and bolt the strut in top and bottom...thoughts?