By Tien118 and Wilds Obscura.

Layout found by Wilds, coding done by Tien. (but a lot of revision on both parts was done by each)

Progression went:
Two arms and three track, one piston three track, one piston two track, two arms one track but faster, two arms no track (besides the wheel), and now removed a bonder.

We're really happy with sub 400 (even if there aren't any pistons lol)