jax, great pics! the light wasnt designed for a light sock, so i am not surprised it is a bit hard to turn on in one its a big light for a light sock, and i never envisioned it in one. it sure looks purty in your pics though
Since the DRIS 500 is only slightly larger than the Ultra Nova, and I've been using the UltraNova in the U-light sock for a year+, I don't foresee any problem with the DRIS. It's smaller than an HID head, and the length has not proved to be a problem.
I use the Ultra Nova for catching an buddy's attention in day diving, and for pointing at things.