Jazzkatt70 - I just repaired mine; it's not too bad if you take your time and mind the order in which things are to be disassembled/assembled. Luckily, if yours is like mine, the only problem is the switch lever (number 103 in the service manual) pivot lube gets stiff and it isn't able to slide up/down for different RPM settings which doesn't require any disassembly at all.
I ended up taking the whole thing apart to discover that, but again it isn't necessary to disassemble for lubrication of this particular shaft. I put a drop of Tri-Flow on the end of a screwdriver, dabbed the droplet on the visible portion of the shaft and worked it in gently. Fixed!
If you do decide to take it apart then the only tricky part is the spring clip underneath the pitch control knob. It comes off with patience and a screwdriver, but is at risk of flying across the room if you're not prepared for it.