Frustrated with Trial and Error Beadweaving

I haven't posted in 10 days and still I don't have a thing to show for that time.  Trial and error beadweaving seems to have become mostly error.  I'm in the process of starting one project over for the third time.

It uses size 15, 11, 8 seed beads and 3mm rounds.  I have relatively uniform 15's and 11's, but not only are the 8's not uniform, they are cylinders and much too wide to be considered 8's.  They just didn't work.  Too bad because I really liked the colorway.  Now I have to sort through and find coordinating beads of a different color way and see if that will work.  

It's one of those monday's every body moans about.  I keep telling myself "this too shall pass".  Maybe I'll believe it tomorrow.