RE: You just might be a "modder" if . . . .
And "modder" is a word I made up to describe myself -- it means "someone who compulsively modifies his or her RV."
:W Ummmmmmmm pretty sure you didn't just "make up" that word.
Also pretty sure it isn't specific to RV's.
That phrase has been around for at least over 30 years, pertaining to everything from people who modify their cars/trucks, computers, RV's, etc. etc.
Do It Yourself Modifications and Upgrades (DIY)