Reta has gone in 2x a week for 2 months now and pinning still isn't any easier. In fairness my husband does it for me, since I'm a big chicken! So a V4 pen is on order and hidden needles are the plan. In my amazon cart sit 33g 4mm pen tips, and I keep second guessing whether 6 mm would be wiser. Fluffy is a fair description of me, so fat is plentiful. With the pen cap on, will 4 mm reach deep enough?