i ordered some of the nextec line locks from quest. i think it said they were designed for 2-3mm line. i found them to slip using the 1.75mm zing it (single braid dyneema)
i've always had great success using the msr groundhog stake. if you position the stake facing the right way, you just wrap one and a half turns and flip the tensioned part on top, it holds. line can tighten one way just by pulling, but holds tight, nothing to tie at all, it's built into the stake.