Use threadlock compound on all the bolts, and tighten the bolt that holds your sprocket on after you've torqued up the axle bolts. Profiles are equally as great as they are shit. If you assemble them without threadlock /coppaslip(are they sold with these now?) they tend to come loose and creak a lot. This is probably where a lot of complaints arise.
http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Service-Aids/Adhesives/Threadlocking-and-retaining-adhesives/30881/kw/87-0386?source=googleps&utm_source=googleps
Use threadlock compound on all the bolts, and tighten the bolt that holds your sprocket on after you've torqued up the axle bolts. Profiles are equally as great as they are shit. If you assemble them without threadlock /coppaslip(are they sold with these now?) they tend to come loose and creak a lot. This is probably where a lot of complaints arise.