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Now we're talking. Thanks @RedCowboy for your thoughts, but can we please stop focusing on the ice question? You definitely picture something different in mind and I spent too many words explaining the purpose of the gadget, but still didn't communicate it well enough. You also probably picture...

"won't work", "smh", "stupid fucking question" and no one can even explain what they mean – great answers, kids, thank you.

Is it a usual thing on this forum to tell "it won't work" or "smh" without even bothering to explain?

I'm getting that you're keep saying "it won't work". If you can elaborate on your answer, that would be great. About "few inches" – yes I want this to be as small (pocket-sized) as possible Requirement for carrying around 1.5m tripod is killing the whole idea probably. My assumption that...

First of all, thank you for such an elaborate answer. While I'm fully aware (or at least I thought so) about danger lasers >5 mW pose to the eyes, I didn't fully realized that my second idea (laser on the ceiling) is not safe at all. (to my defence, that was a quick follow up idea I didn't...

Idea is that each skater/coach is able to draw different shapes and change them multiple times during the skating session on any ice rink (even public sessions). So the ice rink paint is not option.

Hi everyone, I'm doing preliminary research for the idea of the device that would draw the figure skating shapes onto the ice. There are few ideas and bunch of questions I hope someone can shed a light onto. There are two setups I think about: Portable laser setup placed ~1m above the ice (on...