That's just part of engineering. If you intend to manufacture in Eu/US you have snap together parts - much more expensive mould tools but quicker assembly. If y

That's just part of engineering. If you intend to manufacture in Eu/US you have snap together parts - much more expensive mould tools but quicker assembly. If you are manufacturing in china you use screws, cheaper tooling but more man hours to assemble. There is a whole industry of cost reduction engineering to optimize for this.