As Ross says keep the exposures short. Take lots of them at the highest frame rate available and practice anticipating the focus sweet spot. The rest comes down to a little experience and a lot of luck. You've got a good scope for the job and combined with the 2 x Powermate it'll be perfect for nights of exceptional seeing as you will be able to image at f20+, but for nights of average seeing I wouldn't use it. You're definitely on the right track and with a little more practice together with the right conditions you should start to see some big improvements. Well done!
