I just gave my R9 its regular cleaning and found myself using the late R. J. Hedley's "secret" spacer tool fashioned from a simple paper clip. That little device is pictured in the photograph at the top of this thread,
It occurred to me that some of the newer members of the forum might not have seen this example of how a brilliant engineer's mind (and R. J. certainly was endowed with that) can see simple solutions to complex problems. I have therefore brought the thread forward in this topic.
This little spacer device of R. J.'s can provide that needed start for inserting the recoil assembly into the slide on top of the barrel when hands are still slippery from gun oil. After the recoil assembly is pushed in place, it is just a matter of aligning it to be centered in the slide, laterally and vertically [i.e., the rear of the assembly should not be depressed in the slide but elevated just enough that it rests parallel with the edge of the slide]. The slide is then attached, compressing the recoil assembly until the barrel pin can be inserted.