Tank Track

[EricH]

Originally Posted by rocketperson44

I don't exactly understand what you mean by "lump." Pictures may help.

I think it looks something like this: (rotate 90*)
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You could try using a counter-rotating wheel or similar item above the "lump" to guide the cubes in. It can be done without any additional motors-- use gears.

Or--flip the cubes over it using a lever of some form, maybe.