If it's the refractor version, it's not the 76mm/700mm you initially stated though :-) Then it's a 70/700 (or any markings on the telescope itself)? Still, the basics regarding maximum magnification should still apply.
Yes, refractors usually have more back-focus, so a 0.965-1.25 adapter will work (Random Example but ships from China)
Do note that some don't have a groove on the 0.965" barrel, meaning they won't be as secure inside the original focuser, but with cheap, light eyepieces this doesn't really matter as much