Dave - The hex socket is glugged up with something metallic that will not come out... My guitar does get glugged up hex bolts too.. I know what you're talking about
On the bright side, I was able to remove one bolt from the RA motor, and rotate the motor around on the other bolt, allowing the plastic coupler joining the motor and the worm to come free, and I was able to adjust the RA worm... It is now silky smooth in both RA and DEC, feels to be very little backlash.... I am really happy I was able to get this all sorted myself.. I was going to pay to send it to NSW and get Mr. Ward to service it for me, as I feared pulling it apart... Seems my metal working background and the wealth of information on IIS has seen this job done for a grand total of $10 worth of grease (which I may have used 0.05c worth on this service)
Bargain! And satisfying too...
Can't wait to get this out under the sky!!!
Thanks everyone for your help and contributions to the thread... Very helpful bunch!