use an appropriate size bucket [any container] - hang however many pieces in the solution - multiple pieces can be hung off the same rod, various ones may take differing times to clean .... could also put a metal screen basket of small parts in a bucket of solution, tho' that might not have as good a result
no problem if ya wanna do other things, just put the parts in the day before you'll be ready to carry on with them instead of having a bucket of stink around for weeks until you spend all one day lookin for them darn parts you put someplace before you got distracted to another job
Bill