I've bought a pair of the heavy duty gloves for the Kubi system instead of the easily torn Marigold G17k gloves. Problem is I can't fit the damn things on the gloves. The 'outer' ring won't fit over the thicker gloves when rolled around the glove o-ring. Tried lube (Fairy), brute force but to no avail. Has anyone successfully fitted thicker gloves? How? Does Kubi make a larger (inside) diameter outer glove ring?