MY RB kit is a version of the axe which is as good as new (only 3 new handles and 2 new heads) all courtesy of KEH. It (the progenitor) was an impulse buy at a camera fair, well used and eventually experienced a jammed on lens and a stuck shutter.
The only part of the original remaining is one ground glass screen and the pop up finder shade. Via KEH I have an excellent selection of 5 lenses and a like new body, ground glass screens, concertina lens hood, dual cable release and extra back for about $800.
I believe that that this is the way to go.