had no problem with the allen key bolts for the crank arms. the "one-key release" dust caps are the only ones i've used that actually help keep the bolts in place, given proper fit with the included plastic washers.

besides my two univegas with arabesque, i've had two other bikes with these crank bolts and dust caps. both worked fine after i overhauled them. the caps can be difficult to remove on a bike that has sat unused for years.