I like the feel of my 125g thuds in hyperloops - I tried some large DX's (190g) but didn't like the feel of them, they just seemed a lot more jerky, which reflecting back seems counter...
I tried EL wire as string for a set of poi once - for the first 5 minutes or so it looked fantastic, but with all the twisting and flexing it did, it damaged the insides and slowly bit...