I've got 2nd hand 13mm Type 6 and a 6mm Radian and yes both are great. The cool thing with a decent mid-focal length like the 13mm is that with a good barlow (like you have) you still get 82 degree FOV and good eye relief. I rarely use the radian as a barlow on the nagler is VERY civilised.
Disclaimer: Robert is now a certified camera nut who hasn't used his eyepieces all year
