I would agree with Louie on his assesment of the skies. I estimated 5.5 to 6.0.
Louie,
Have you tried Mark Suchting at Deep Sky Optics ?
http://deepsky.cia.com.au/optics/
Telephone: 9456-2215
Give him a call he may be able to do it. Failing that I would ring Don Whiteman at BINTEL and ask him who you could send/take the scope to. I know Don doesn't do refractors but I am pretty sure he would know who does. Its worth getting the right person to do it as the objective will need to be recollimated, as you would already know. Does it have a user adjustable objective cell ?
CS-John B