Alternative to a tensioner tool

My mom owns a minivan. Since she can't afford (on retirement benefits) to have a certified mechanic fix it at a repair shop, it falls on family (usually me) to do the work of repairing it when needed. It's a 2006 and in the summer of 2012 I had to work on the alternator (specifically the bolts mounting it, as they seem to like to shear or back out). I used a specialty tension adjustment tool several times (as I couldn't remove sheared pieces of bolts quickly to replace with new bolts). Last month, it had the same problem. This time I couldn't get a tensioner tool (it was 2am when I remounted the alternator and the parts store had been closed for hours). I had to do it another way, which turned out to be MUCH easier. I made this video after I had removed the sheared bolt pieces and remounted the alternator with new bolts.