Wouldn't it be better if the device was declared at customs as educational subassemblies? In principle, there is nothing wrong with it, we don't make a profit, we don't resell and by the nature of the product the device can be continuously improved. Possibly even a disassembled product. Surely radio amateurs can assemble a housing... On this principle, for lower customs duties, many industrial assemblers receive televisions. Just an opinion...