RE: 157" Discus Glider
I have one.
It seems to be a nice ARF. I had a Robenmodel(SP?) ASK-21 4.2M and have a 4M Alpina, it's lighter than both. It appears to have a lighter glass fuse, it uses a stab pivot like my RnR Genesis, but the stabs servo is in the lower tail which makes for a very positive setup. The wing rod is a 10MM round rod, I like that better than the wing blades on the Alpina, but not as much has the hollow 23MM tube of the ASK-21. I also have their 103 e-sailplane it uses the same rod, a little over kill there, a little under sized here. The wing looks as if the airfoil is a SD-7080, a MH-32 look alike. It seems one guy sells an all white one, the guy I bought mine from had them cover the bottom of the wing in red, so if scale is your thing get the all white one, if you're looking at it as an inexpensive XC ship get the red and white one, mine's red and white.
Rich Border
EDIT...I think the airfoil is a S6063, which is much thinner than the SD7080. S6063 is about 7%, 1.42% camber, it will be fast.