I built a capsule, but it was heavier than expected; over 100 grams. So I build a second one and it's much lighter. The capsule itself weighs in at under 40 grams. The tracker, sans batteries is 70 grams and the cams weigh around 15 gm each (x2), so I'm looking good for a total weight of 250 grams. Might even have room for a very small payload of some sort.