BWG, which struts did you have that busted? I know for the k9 they had two different designs. One was a thicker strut with the hole and the other was more of a loop welded on the outside.
I saw some pics floating around on the site when doing some searching, I believe KaptainAmerica has the older style struts. I'm just curious as to which style split on you. These were made with Aircraft Aluminum should be able to withstand 40 lbs of pressure, you would think.
Found the pics:
Old Style K9 Strut: (Figured I would use WSW pics for my example- Free Publicity)
Newer Style