You can get a small adaptor which replaces the 1.25" on the rear of the scope and gives you a SCT thread ( identical to the Celestron/ Meade thread) This allows you to use all the Standard SCT accessories; focusers, flip mirrors etc etc.
The only real problem is that the internal baffle on the Skymax is only 28mm so adding anything large (ie 2" fittings or eyepieces) is a waste of time.
http://firstlightoptics.com/products.php?cat=55&pg=2
( half way down the page - 19.50Gbp)