how do i rig a classic levitation illusion on a touring bike for night rides?

i've been tinkering with a cheap 2‑stage levitation kit (magician's choice #M-112) and trying to mount it on my touring bike frame the goal: a quick flash levitation of a small prop (like a coin or mini card) while riding through low‑light trails here's the setup i tried:

• base: 6061 aluminum bike rack, welded to downtube, uses 1/4‑inch m6 bolts (same as standard rack mounts)
• illusion rig: magi‑cable 7‑ft #C14, hidden in the chainstay, connected to a spring‑loaded platform (model SFX‑P2)
• control: custom arduino nano (v3.0) with a 2‑sec delay, triggered by a pressure sensor on the rear brake lever
• power: 18650 li‑ion cell, 5v regulator, lasts ~3h continuous

the biggest issue i hit rn is the vibration messing with the cable tension, causing the platform to drop too early i read that using a dampening sleeve (titanium‑coated #D-9) can reduce resonance, but i haven't sourced it yet also, the legal side: some folks on this forum argue that adding any non‑essential gear is unsafe, but i think if you balance weight properly (i keep total extra < 300g) it's fine

anyone who’s done a similar rig or can point me to a better vibration‑isolating mount? also, i heard about the "Miller's Quick‑Flip" (model QF‑7) for faster release—does it actually work on a moving bike or is it just stage‑craft? tbh i’m leaning towards ditching the arduino and going full mechanical with a spring latch, but i need data

thanks for the input, will post results soon