Nick,
Yes basically....
Check out "finder guiders"...
You will probably need an adaptor which screws onto the body of the finder (where the eyepiece is currently).
I don't like or use this system, so hopefully others can help you.
http://www.iceinspace.com.au/forum/s...d.php?t=121324
Glen - I find a car voltage convertor (from 12v to 18v) set to match your laptop is much more efficient than using a 12v to 240v invertor.