Just got into building my own suit and I got a latex mask the other day already foamed. Mask is uncomfortable to say the least but I realize it will take some trimming of foam to fit right. My question is, how do you breathe in the mask? Do you cut a small hole anywhere or what? Also, since the mask is already foamed, how do I mount a bio? I went and bought magnets the other day before I got the mask. Will I have to bore small holes into the foam and hope I can line up the magnets? Any help would be greatly appreciated. Thanks!