Speaking of Cool Weather Clothing...

I just finished the first of the Yummy Fable Gloves, just in time for the nice warm weather : Somerset is unimpressed. Once you get to the fingers and thumb, it's a free form pattern; the designer provides some motifs to mix and match. I'm thinking that the next pair I knit (in green, and shorter) I'll just stripe the fingers as well. Speaking of thumbs...when are you supposed to stop knitting the thumb gusset and start the actual thumb? Is it before the web between the thumb and palm is covered up or after it's covered up? When I followed the pattern as written, I still have visible "web": It occurs to me that the glove pattern is written for hands that are average length, rather than for someone with long hands. The next pair I'll add a few rows to the bottom and the top of the motif, and I need to figure out how much longer the thumb gusset should be.