I suspect the Tslim occlusion problem is in the micro-delivery or slow delivery of insulin. Tslim is one of the few pumps that delivers quite so gently and in such small doses. Slow delivery may be good for fresh, new sites or certain skin and tissue types, but not for mine. I seem to need faster, more forceful insulin delivery to cut through the tissue and deliver insulin deep enough.
In my 20+ years pumping, I've used Minimed, Animas Ping, Animas Vibe, Omnipod, Snap and TSlim. Both Animas and Minimed delivered most forcefully. Snap was in the middle. Omnipod and Tslim were too gentle and both gave me frequent occlusions. Though I love the TSlim and Omnipod technology and features, I cannot handle the soft delivery and resulting occlusions. While I don't understand the design reasoning behind TSlim's slow delivery, I wish they would offer a fast-delivery option to customers so more of us can enjoy their beautiful pumps.