I think Tom E’s tear down thread is going to be helpful. Wurkkos TS21 tear down
The driver is glued and Tom E pushed out the glued driver using a pick and a hammer. However, there is a risk of damaging the components doing so.
I disassembled my TS25 thinking it would be similar to TS21, but I damaged several components (the switch and the button led) during the disassembly.