I thought I read that the trex 250 was indoor rated? Iassume that means fairly safe?

Yes I could get by w/ a straight down attack that hits if above target, probably much easier to perform this type of retrofit.

Ican likely trim weight quite a lot, perhaps about the same as about 3-6 AA batteries, 60-120 grams? Ican cut weight by tapping the battery to feed the controller and not having sound effects (speaker and card add weight). The board, wires and LEDs, are very light, and a lens would add weight but not sure if it's needed. Is there something that could lift an additional 60-120 grams if needed and still be fairly safe?

We are playing this game outside and it involves a lot of sprinting through brush etc.Players expect minorcuts/scrapes from just running around outsideanyways. I am not running business or anything, so I don't think I'll be sued or anything for a minor cut, but I don't want to sever limbs for god's sake. those little indoor choppers look perfect for me if they can handle some weight. I just need to find the smallest and safest chopper that can handle some extra weight.

*keep in mind, i would obviously test this device out thoroughly before putting into action with players!