Hi there. I have to agree with the others posts also. I have a 5.12 " skywatcher and really wanted to get some new eps to see things at higher mags. Rather than buying expensive ones or a kit (i looked at exactly the same one) I actually put a post in the classefields on here explaining i was looking for some starter eps or barlow to buy if anyone had extras they'd be willing to sell. I now have (thanx to some lovely people here) a 12.5mm and a 4mm on top of my standard 10m ad 20mm. Its been a great way to check out what sort of view i will get and to learn some about eye relief and such. See if you can do something like that maybe. wont cost you much, and youl still get a good idea of what is really going to be benificial to you. Now im just on the hunt for the barlow and il have 7 eps.
Cheers
hope you have some luck.