Hi Chris... I am no expert on Astronomy, but do have a bit to do with electronics so I think I can help. This power supply would be perfect for your scope. As these power supplies were often used as a lab supply they have very stable voltage supply once selected. Also the Amp rating is hight and more than enough to supply your scope and heaters. Goto Scope use very low current to help with battery life. You will get good clean supply with you power supply and all will be good...
Cheers
Mardy