On Wednesday, May 13, 2015 at 7:04:30 PM UTC-4, wrote:
Do winglets make any real difference in terms of handling?

CoG max front. Does it adversely influence handling?

S

First question- It depends upon the glider. Some gliders have significantly improved handling at low speeds when winglets are installed.
Second question- forward CG adds stability and accordingly can reduce response to maneuvering inputs.
UH