competition???
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If this is what you were talking about @Tokoloshe I sure hope so. Have a spot open just for this to nominate!
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Today I’ve tested aluminum milling on my LR3, and it’s ready for cut the side plates of the V4, The jackpot and 10v spindle I/O module are on their way to be delivered(ordered from Elecrow, I live in EU).
I found 30mm tubes in a shop next to my home.
I’m designing a new table, with enclosure, and all the electronics inside, because the first LR4 will be a small one (400x400) only for aluminum milling.
After that one I’ll upgrade my bigger LR3 that i use mostly for wood.
I’m impatient 
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Where do you get aluminum for milling, always wanted to try!
If you have a metal supply store nearby, you can likely get offcuts, often called “drops”, at a discount. If you don’t have a store like that, Amazon is an option. Here’s the listing I bought recently:
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You can also check for fabricators welders and engineers near you, visit them with cash (and optional but recommended- a packet of biscuits/snackbars) and ask if you can get some drops or offcuts.
I’m about to do the very same thing later today, I’ll let you know how I get on 
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Hello Joseph, can you tell me the dimensions of the aluminum plate. I still have some lying around but I suspect that they are a bit too small. I could then order new ones in the meantime.
Two sets of XZ plates for the LR4 can be fit easily onto a 12" x 12" piece of aluminum. One set can easily be fit onto a 12" x 6" piece of aluminum.
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For testing purposes I use scrap pieces gived to me by a friend. For small quantities I use Amazon or Ebay, is not the cheapest, but is fast and in small pieces. Usually the stores in my area sell only thin plates or profiles.
The amazon seller I use is “Full Armour”
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Now I have a 200x200x6mm plate, Is it enough for both, maybe with a tight fit?
Will there be a 32mm pipe version of the LR4? 
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Seems like it’s already one of the choices.
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Mine is 32mm as well.
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How thick?
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Results of todays scavenging:
2 bits of 10mm Aluminium (it was either that or 5mm) for tenbux
Edit: tenbux and a packet of Halloween cake bars.
Smaller one is 180x140 which hopefully is big enough for one plate, if not there’s definitely room for 2 in the bigger one.
Annoyingly he had offcuts of 5mm that were like 1400mm which I’m guessing is juuust too short for a full sheet build.
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48.5" Usable X may, or may not, need 1399.65mm Pipe/Strut length… Hopefully Ryan’s able to confirm numbers soon to help folks gather scraps/materials.
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Hopefully. And fingers crossed they’ll still be there when I go back.
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Edited - I started to say, but I was miscalculating the mm to inch conversion.
1/4” or relatively close to it.