When you said that earlier i looked for teflon drip tips on fasttech... they had a bunch of 510's but i did not see any 810's.FastTech - Gadgets and Electronics
I stick with simple Teflon/PTFE driptips as they are inherently good insulators, and don't gunk up quickly. I used Pyrex/stainless for a while, but prefer Teflon nowadays.