Another posibility: if edge-doubling doesn't make much difference, we
could try edge-tripling, quadrupling, etc.  To do that, it should be
enough to change the following constant definitions in the Dobl script

  @ LP = *pick a path length*
  @ NEP = ${LP}
  @ NVP = ${NEP} + 1

@ LP = 4
@ NEP = ${LP}
@ NVP = ${NEP} + 1
@ WP = 1
