I started on the Wala (was Aerobe) Then grew into the Wala XL.
Both are really great, they glide well can belly launch and can still be used as a regular SLK.
I also have a Zero-G which is a very nice glider, I can get really good distances out of it.
Not so much a regular SLK, but a great Glider.
Yes the Zero-G was based of the Plutz design.
I got heavily into SL Gliders, but I have re-focused on Quad (REV) at the moment.
But if the day is too calm for my quad skills I will spend some time on the Zero-G too.