Exporting multi stage cut g code

So i have built a stacked text project in Easel. I am cutting with bits from 1/4" down to 1/32". When i was building the files i would just copy them and then change the bit settings. My issue now is that I need to export the g code so i can run it in bCNC (My internet is tooooo sketchy to use easel to run the projects). My questions are: can i combine the g code in to one file? and where at in the code will it tell me that there is a bit change? I am guessing that even if i cant combine the files, i could go erase the parts i dont need as the bits step down.