I like to multiply every chip in play by 2-4, 3-6, 4-8, 6-12, and 8-16 when making blind structure. Also you can put 1-1, 1-2, and 1-3 levels in at the start of you like.
So maybe
1-2, 1-3, 2-4, 3-6, 4-8, 6-12, 8-16 (remove T1)
10-20, 15-30, 20-40, 30-60, 40-80 (remove T5)
And so forth.
I wanted a 3-4 hour tourney so we could follow it up with cash. I'd probably add a few more levels down low if I were to do it again but overall I am pleased with how it turned out.