Personna Lab Blue. I think 4 shaves: I loaded this one into the Fatip on August 1, probably used it 2 or maybe 3 times that month, was not here (thank, Ida) to change it again on September 1, and I know I used the combo last Sunday on a 60-hour beard.
Gillette Astra SS (6) rule of averages tossed at 6(today)
Personna SS PTFE injector(10) rule of averages tossed at 10 (1Wk ago)
Have some great shaves!