30 into 28 best min fragment found: 10
  Cut up 30 sticks of length 28 like this:
    6 x (14 + 14)
    12 x (12 + 16)
    12 x (10 + 18)
  Reassemble as 28 sticks of length 30 like this:
    12 x (14 + 16)
    12 x (12 + 18)
    4 x (10 + 10 + 10)