After setting four world records in a couple weeks, what does W65 Karla del Grande do to relax? On Saturday, she jumped into a masters exhibition 100 and lowered her own WR anew. Competing at the NACAC Senior (Kiddie) Championships in Toronto, Karla rode a legal wind to a sizzling 13.91 clocking for third (behind a W40 and W45). Minutes later, M50 Chris Warburton won the men’s race in 11.72 (thanks to an illegal wind of 3 mps.) Also contested were men’s and women’s 800s. And in the open women’s 100, W35 Tahesia Harrigan-Scott of British Virgin Islands clocked a…