I am trying to learn how to do mods 100% on my own, and I have a few simple questions...

how are resistors rated?

like a 10 ohm and a 10K ohm, my guess is that the higher the number, the finer the tuning, but less the voltage can adjust?

like a 20K variable resistor is for a Vdimm mod, but a 20 ohm resistor would just fry it?

just guessing...

what does "15 turn" pot mean?

How do you test a Pot, for max resistance before putting it on a volt mod?

more questions come later.
I am just learning, I can do the basics, but I need alot of help.