Hi Ray,
yeah, the 510-A model was really fun to fly.......my first one was an
old bagged out 165 I bought from a friend. It was really easy to turn
cuz the sail was so loose! But you still had to flare it right.
I bought the last 510-A 160 that Seedwings made, they tried to talk me
into a "B" model but I wasn't so sure about a hang glider without a
keel pocket...

)....the new one had VG so it was the best of both
worlds: bag and blade wing all in one!
Those glass tips are common now.....we used to seen as
non-conformists!
Now enjoying the Apis!
Cheers,