EOS clip in filters mean nothing unless your camera is modified. they don't magically let Ha light hit the sensor! Just a word of warning. the only clip in filter that will do anything for you is the CLS one for light pollution if your shooting from a city environment.
if you have the ED 80, even cheaper solution to usb powered mittens is put some card sticky taped to the dew shield, double the extension and well
you generally wont have too many issues and with summer coming up
that gives you a long time to get the right gear that works best.
As for focusers, the best mod to do to your SW focuser is use a Knife stone (you know the ones to sharpen your knives) and make sure that the flat cut out is actually flat as 90% of the time it isn't Youtube has quite a few guides that take you though the process.
Be aware if you are using the orion star shoot autoguider and modifying your standard SW finder that you need to shorten the finder tube in order to focus so the best way to get guiding will be to do one of 2 things.
2" OAG unit you just have to make sure you get the right extensions then life is great! some people think that this is too much hassel but if you get it right you will reap the rewards.
Finder guider package from Orion
to which i would go with the OAG 100% of the time as it will make your life alot easier when you get to your next scope and the finder guider really isn't much use about 800mm FL as everything else has to be nigh on perfect to get them to work properly! If you end up going to a newt they will be useless as flexure kills their worth (past experience).
Brendan (uni student)
