Linear motion kit for TT

Okay, so I want my track to be slid up at the start of the match to hold more cubes. My teacher suggested a linear motion kit, but I’ve been told on here that it’s not very good, the plan is that it’s going to hold 3 cubes. I’ve only build a little today but it’s whats below. Are they a good idea or would you suggest something else. (PS They are steel we don’t have aluminum)

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Dont use that it is too heavy

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Fun fact, they don’t come in aluminum. We’re stuck with the heaviest parts in edr as our linear slides. That’s why cascades and cascading extensions use c-channels wedged between washers. They also have a tendency to fall out, so that’s another (not) plus.

Steel c-channels are a bit easier just because the old black spacers are the right thickness, but aluminum would make it better. I’ll post a video of the banding idea in a few. eno posted some pretty useful links, take a look at those

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