The lethelium is an instrument I invented. It consists of a bike wheel rim, guitar tuners and guitar strings. The Prototype 4 has a resonator built out of copper mugs. I had to raid 4 different dollar stores around the city to make it! I play it with modified chopsticks and sometimes with a violin bow. I later added guitar pickups, a volume knob and a jack. Oddly enough I didn't sit down and sketch out concepts for this one or even the original. Half of building for me is a lot of trial and error and getting your hands dirty.
The lethelium prototype V is actually older than the LPIV, but I upgraded the LPIII with tone and volume knobs, a jack and guitar pickups . It needs further refinement but it's much lighter and I play it mostly with my hands.
The BMX bass was made from an discarded BMX. I had a lot of help figuring out the logistics with James from JK Custom Guitars, funny enough, our bass players is also named James! It sounds great but still needs refining.