hi, i know this isn't a pneumatics question but i didn't think it was worth a new thread, has anyone ever used threaded insert (a screw with a threaded hole in the centre to screw a bolt into), this is for my drum spinner which is made of hdpe with an aluminium lid, i need them so the lid can be removed easily and thought it would be more durable than a tapped hole. i just wondered if anyone had any expiriance with them and could give me any feedback or tell me where they got them from?