I imagine a string would be subject to extension rules, though it would be somewhat of a gray area.
I dunno how a laser pointer would play with the battery / power rules.
I’ve seen teams make clever use of straws and tubing before though, so take that as you will.
Well, unfortunately it seems that consumer laser pointers are all at least class II, so that’s a no-go regardless (the language of the rule makes me think that a laser pointer on the robot would be illegal even if it is never turned on during match play).
Still thinking the string is probably a good idea, if it’s allowed.