Everard
I had the same goal - replace my standard Crayford with a 10:1, but then got a good deal on a used Orion Accufocuser. A bit of ATM work later and I had it fitted - see here:-
http://www.iceinspace.com.au/forum/s...ad.php?t=10782
Now I don't have to touch my scope to focus at high magnifications. I was having trouble avoiding vibration as I focused. And the fine control is excellent.
But if you were starting with a new electric focuser and factored in your time, the 10:1 is certainly cheaper (and you can probably sell the replaced Crayford) - unless you want no touch focusing at high mag.
Eric
