Cannot remove the cassette even with the right tools

[Cataboo]

Thanks for the tips.
My cassette remover does have a "guidepost".

The handle I used is only 20 cm long (7.87"). I better get a longer one.
I check that the max torque to lock the cassette is 40Nm. Based on my calculation, it means that I need to apply 200N force (~ 20.4 kg weight!)

If you've got a metal pipe, you can slip it over the end of your handle to get more leverage.