Think of the serverkit as a "black box" exercise in trial and error. The gfs are undocumented and arcane... some have an effect others do not, some will crash the kit some will not, some will only crash the kit at certain times... none of which is documented. If you have a gf error, the kit will not tell you which one, only that you have an error, you have to find it (thus start from stock and change only one setting at a time and run it for a while to see if it has the desired effect and does not destabilise the kit).