[Nuttyman54]

It's also worth noting that for district access periods, R18 specifies 30lbs total between the access period and the event. That means you can't swap out a 20lb manipulator for an upgraded one during the access period and then also bring a spare of the new 20lb manipulator to the event (total of 40lbs). You could do that with a 15 lb manipulator and a spare (total of 30lbs).

My interpretation of the rules also allows for the team to put an upgraded 20lb manipulator on during the access period and bring the old 20lb one they took off as a spare at competition, since that was part of the original bagged robot. Someone can correct me if they think this is a misinterpretation, but since I believe the intent is to have the robot access period act like a regional Thursday, this makes sense to me.