Someone mentioned a passenger seat. IMO it’s important that we don’t add hassles for folks that instruct. A seat, mounts and harness is probably 30lbs.
There’s risk in trying to get too close to the min weight. Our scales have their good days and bad days. Last Spring I weighed the car before Qual and was surprised to find that it was 25lbs lighter than I was sure it should be. So I temporarily added 25lbs and after the race I flunked weigh in by a couple lbs. I should have had 10lbs of cushion and I flunked weight. I was pissed.
So after the event I added 35lbs. I figured that would about give me my 10lbs of cushion back. Fast forward to the next event. I weighed in prior to Qual on the same damned scales and I’m 35lbs beyond my 10lbs of cushion…WTF.
There’s plenty of other anecdotes like this.
The morale of this story is don’t try to cut the weight too close. IMO the target should be 15lbs of cushion at race end.