Hi. I have had a Spirit Combo pump for a year and diabetes for 32. I like the better control l get from the pump but still get little hard lumps around the insertion sites and wondered if these can be avoided? I use the softest plastic 'needles' and the site is changed twice a week to alternate sides of my abdomen. I exercise 5-6 times a week.Tips or referrals to a more relevant area of the site would be most appreciated!