<-You can fill these two in after it's constructed
     
EDIT: 2x5 version. Works better, only needs the overhand if you have a low ceiling at the top.
Quote from harukastu »
Red wool are the spring blocks. :3 If that helps anyone at all.
   
Delete the water stoppers.
Place two blocks to keep the push current at a height of 1.
Remove the dirt blocks. And the water doesn't flow over onto the fall area.
On the bottom.
You must have at least partial walls at the "start" of each vertical direction to make sure the boat doesn't overshoot the shaft. If you're digging this into the ground, it won't be an issue.
The wooden catcher at the top should not pose a threat to your health, and is essential to the operation of this thing. Without it, the boat spends too much time bouncing up and down to get enough speed to make it into the down shaft.
You should be able to figure out what order to do things in to get the correct water flow at the top. Once the top is done, you should just be able to drop two water springs at the far side of the bottom. Once it's complete, just drop a boat in and go!
If you time it right, you can get two boats going on this one at once. Maybe more if it were taller. i tried making three, but couldn't get the third in before another one came by and jammed the whole thing.
Ooh. I'd be interested in seeing how you got that to work.
I installed one of these into a leftover strip quarry in my main world, I can get to and from my bedrock-level mines in no time!
Quote from Darentei »
Personally I believe I would spend too much time designing the thing to be aesthetic before functional
I'm sure a compromise can be found.
I was just trying to get it to work. That world exists only so I could design this thing. The one in my mine looks a little better, I suppose, but I guess it's still just a pair of cobblestone platforms...
^Pretty much that.
I'll take another stab at the video.
As for tossing in multiple boats, it depends on how tall it is. On the one int he level save I posted, I was able to get two going at once. A third *might* be possible, but I couldn't get it to work. It's tricky, because if they do bind up at any point and get stuck on eachother, when you try to get it going again one or both of them usually gets broken.
EDIT: Wow, okay, my screen recorder really doesn't like minecraft. I'll have to find another one.