Sorry Sir! (And me a mere stoker.) But you said it was slatless in your post.
What I
actually posted was:
The only occasions I recall getting the stick shaker during normal flight was if the AoA probes hadn't been correctly set up. However, the lift rate modifier and pahse advance were more sensitive during slatless approaches and would often cause a brief rattle during the approach at around VAT+10.
We had one K2 which had never had the wires from the lift rate modifier connected - some idle git at the factory had just stuffed the wires behind the unit and it wasn't discovered until 'Scrapheap Challenge' at St Athan did a major service....
I had the stick pusher on a flapless approach once - and yes, it can be overpowered by the pilot! The aircraft had been sitting around at Incirlik for weeks and was just back at Brize - this was probably the first flapless approach it had flown for months. We later figured that the AoA probes were sticking due to all the dust and lack of washing at Incirlik, so had perhaps jumped and detected a spurious high rate of AoA change.... After which the aircraft were given a good clean when they returned from Incirlik.