Does the shift cable need to be replaced with changing the bellows? I see in the Merc manual that the "shift cable should be replaced as an assembly only". Does this mean that the cable must be put back assembled/whole/new? Or, just not to try to replace individual pieces of the cable assembly? I don't think any of the bellows have been replaced and I'm trying to do everything I can now to have an easy spring launch. I plan on replaced the u-joint bellows, checking/replacing the gimbal bearing and u-joints, replacing the shift bellows, and replacing the exhaust bellows with the exhaust tube. Anything else I should check while I have the thing apart?