r/ffspc

i have a rotary tool already. now i just need the right bits for the job (like this image above. credits to owner ofc)

to those who have done this, can you share your tips and how to go through it? personally i was thinking of marking the square (to allow for longer gpu's and cpu's) with a marker first, then drill small holes along that line then proceed to cut it.

question now is, which drill bit to use and what material should they be? steel i guess? to those who have experience cut/dremel modding cases share your advice please! thanks!