I built this monster four years ago from some cores cut by a local hobby shop.It has given great service as a club flyer, park flyer and sloper and it's constuction method means it will probably last forever short of being run over by an 18 wheeler.
Gave it a wizz around at my local park the other day when no-one much was around and it's great fun to fly, though really shines as a sloper.
Here's a short vid: