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Hi Trevor,
1)No idea to the question as to which item to use, but I use an Orion collimator and had a bit of a wobbly issue in the old SW focuser. It works well/ok for a noob. But in my new Moonlite focuser it seemed more solid and therefore seemed more confidant that I got the collimation right......which brings me to ....
2) I did buy a Moonlite focuser which has ( or can have ) a lower profile due to the adapter plates and shorter draw tubes which can be interchanged depending on what you need .....
3) what the Gekko said!!!
HTH
Bartman
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