This is an interesting design. The pistons let you stick the side cannons out for more leverage, while keeping the craft small and nimble. There's an alternate method of steering that might interest you, which Algae used in this hovercraft: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=504986118

By the way, thanks for the comment on my saw car; I'm glad you enjoyed it. If you could leave a thumbs up so I can hopefully get a star rating, I'd really appreciate it. I understand if you don't want to; it's just that Steam seems to require a lot of votes before it shows a star rating.