The screws are not Philips 00. They are smaller than Philips 000. I am looking for a screwdriver in that size.
I have the iFixit toolkit, and the PH000 tip simply did not fit into the head. The J000 tip could remove a couple screws, but started to strip the head of two others before I stopped. The tip almost stripped the two I removed on reinsertion.
The replacement trackpad comes with a set of these screws.