[ophic]

It's a simple job. You will be able to buy a torque wrench and a breaker bar and the right socket for about the same as the garage would charge you to do the work. Then you'll have the right tools and won't ever need to pay anyone ever again. Well not for tensioning the chain anyway.

I have a breaker bar and a large torque wrench and they are phenomenally useful, general purpose tools. Well worth splashing out on imho.