60mm f12 Refractor Finder eyepiece?

[MattT]

I'm making a finder scope out of a 60mm f12 Objective.
Trying to choose between a GSO 50mm Superview or a TV 55mm Plossl.
With a 40mm ES 68º eyepiece I can detect a bit of FC in the objective….a bit hard looking a trees…so which one?
GSO $59 from Bintel
TV 55 Plossl a lot more! I know there is one for sale in the eyepieces.
I suppose the answer will be the TV 55. My ES 40 weighs a kilo so that is out.
Other suggestions….is the GSO any good?
Matt

[MattT]

Thanks to Alex for suggestions. Have ordered a 38mm SWA from Agena Astro. 70mm AFOV will give 3.9º TFOV with edge aberrations at a minimum I hope, and an exit Pupil of 3.3… It weighs 600 grams :D