M3 spacers with the normal 6mm threaded area are too short for the Blade 3. In your cluster video spacers with longer threads are shown. Do you have a source and dimensions you can share?
Hello katatsumuri, the recommended dimension of M3 hex spacer is M3 x 26mm + 11mm. The length of threaded area is 11mm and the length of hex area is 26mm. If you could not find this kind of spacer in the market, you could contact our support via direct email at info@mixtile.com. We could provide you some spacer for free. Sorry for the inconvenient here.