I've come up with an ammunition that I'd like to make for Mr. Sprave. Noticing that much of the ammunition he uses has one dimension near 20mm (bearings, fletching on crossbow bolts, etc.,) and knowing that typical LED star boards are commonly found in 20mm diameters, I could build him some 'tracer' ammunition for him to try out, if he's interested, as a way of saying 'Thank you for the laughs and entertainment you've brought to me.' I'm fairly sure these could easily fit in some of his already-existing super slingshots! I've got several spare boards and LEDs. I would need to find some micro-cell batteries and very tiny switches, that shouldn't be too difficult. What I've come to ask you is should I just leave it wide open, or should I put these in some sort of casing? I like seeing LEDs get pushed to the limit, especially in equipment of my own designs, but at the same time I'd certainly like these to be reusable and provide him with as much entertainment as he's provided for me. I already know that the weight distribution isn't going to be very uniform either way, and I'm not entirely sure how I'd encase the entire circuit, let alone what material I would use (poured acrylic?) Leaving it bare would make it perhaps a bit more effective as ammunition (assuming it wouldn't start tumbling) due to the thinner edge. On the other hand, encasing it would give better ballistic qualities. Thoughts?