Re: 3wt Help.
I use 3X & 5X tippet most of the time.
3X for size 10-12, and 5X for size 14-16.
I rarely use anything smaller than a #16 or larger than a #10 for 'gills.
I do make it a habit when tying to avoid getting my flies too heavy, though. I prefer wet flies that sink slowly instead of plummeting to the bottom. For example, I'll use bead chain eyes instead of lead eyes most of the time. Casting #10 flies is probably pushing the limit for the 3wt.