I really can't seem to find what i need because i keep getting conflicting information. I live in the south of england, temp on a good day in summer around 22C, in the hall we play probs about that maybe 20C. I want to know which speed shuttles to use. I have looked and the majority seem to say Yonex Speed 3 and Others 77. Is this right because some have said 78, others Yonex speed 4? I have looked on here but its always advice for Australia, America and the far east.