We're doing a test run with a Medtronic Veo this weekend, using Sure-T infusion sets. So easy to insert, however, our 8 yr son complains of ongoing pain (from the needle area)-he's very lean. We've tried the abdominal area 2x-both times painful, and the rear (above buttocks) once. Most success with rear-until he used his backside to push himself out of a deep chair. Any thoughts?