About the machine size,we send you the PI and contract,you didn't say anything wrong with work area. You also sign the contract and send back to us,we made the machine according to the contract and then send to you. We always use the international standard length unit (meter/ millimeter) when make the quotation& PI&contract, in order to avoid mistakes in the communication. About other questions,our technicians help you solve it when you send message in the group.And we keep a positive attitude and trying to help you as fast as we can when you ask even at that time we are in the Chinese new year holiday. We will keep the positive attitude to help you when you need in the future.