I couldn't find any save using tracks.

obs:
* The solution used to be period 12 until arm 3 merged 2 arms and messed with the drop timing witch is dealt by an 2 cycles delay in arm 2.
*Arm 7 saves a lot of instructions by droping only once.
*Arm 6 used to be an biarm and could save a 2I if it had an extra free hex arround it.