Yeah, im with you on the regular maintainance thing, and i change the strings when they need changing not because of the logbook. Its a bit like the ships captain sitting alone at night in the creaking timbers of his cabin, recording the events of the voyage.... no maybe its not even a little bit like that. I like to keep a record of what ive done because i cant remember last month let alone what guitar i used to put down the guitar track on a song a year ago or which bridges ive had on the roundup trying to get it to sound the way it ought to. Obviously not for everyone, and its certainly not something that i let get in the way of playing. I think it helps me get more intimately acquainted with them though.