Vertex are awesome, have no fear!
Like someone mentioned thought hey do take while to hone in. I'd set mine up, get a good skim going and then an hour later it would be totally overflowed. I'd have it rockin for 2 days then ooops, over flowed again. After a couple of weeks of tinkering I found teh sweet spot and it's been a beast ever since. Best skimmer I've owned hands down....
