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Hi Andrew
Thanks for the info. I nolonger have a 494 hand box or an ETX type mount to test this out although I do have the cable. I was pretty sure that the 494 handbox needed to be fitted and aligned first but I had not tried it out with the 497 handbox.
I did a fair bit of testing computer control of the ETX with 494 handbox a few years ago when we were patching the Stellarium telescope control program to work with an ETX 70. The main problem was the data transfer was too slow without adding some delays.
However I think the original poster was hoping to do away with the 497 controller altogether and of course this is not possible.
Barry
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