I bought one of these - preset torque wrench that tightens to 5N-m. http://www.jensonusa.com/store/produ...y.aspx?sc=FRGL

Concur wiht FBinNY - important to make sure each shares the load. I usually tighten in a cross pattern, a little each time. I may do three passes (light, medium, medium hard) before the final torqueing.

EDIT- added web site.