For your information we say 7 – 10 days from receipt of order/payment. This is to cover BWE. Strictly speaking we should not finish/test the dies until payment is received just in case there is any problem with payment. In most cases dependant upon workload and if we have an official order we do start testing.
1) If I were you I would say to the customer that the despatch date is based on receipt of order and payment should be made with order, then the period of 7 – 10 days is the same.
2) Yes it does come complete with undercarriage (we call it workbench or trolley).
3) Regarding payment terms can I suggest 50% with order and 50% net cash 30 days.
I trust above clarifies and helps.