Links for the metronome tool
I didn't realize that SRcom sucked so much for formatting the descriptions. so here's the same thing, but better (?) formatted.
Metronome for removing RNG in the first box.
Alternative download link: https://mega.nz/#!lIsSQa5b!PqHnQZ_LTaeBzvNw5muWl8RJD3fASkVHBXLuHRISoK4
Source code: https://github.com/Allbeert/zamnMetronome
The github link includes some explanation as to how it works, and how to calibrate it for your speakers.
Remember that this only works if you hold up+left from the beginning of level 1, until you open the garbage bin.
Timer starts at power on, and you should press start at character selection when the timer hits 0.
For any% (skelekey), timer starts at -21.04 For 100% (bazooka), timer starts at -22.16