The pistons look great! Nailed it! If you noticed, the RotJ cockpit didn't have any tubes at all - the designers added tons of greeblies. Also, the early production image of Luke on Dagobah didn't have them either BUT were later added...
Might be an option to remove them?![]()
Great build. If you want to keep the hoses in, maybe you could use some aquarium hose (I think it comes in different diameters) and wrap copper wire around it to mimic the ribs. The copper wire might even hold the tube in the shape you need. I think auto or even stereo places might have different ribbed hose for placing around wiring? Some lego sets have corrigated tubes, but that might be a tad small for 1/6 scale?
Keep on building.
Maybe I'm just a ANH junkie, but I prefer the hoses in the cockpit.
Do a search for cable organizers. I'm pretty sure you'll find what you're looking for.