Which cost items are most easily hidden in a rubber vulcanizing press quotation?

• Hot plate material and heater brand are often downgraded; specify 45# steel or ductile iron.
• Hydraulic station servo pump and cooler inclusion affects energy use and price gap.
• Mold mounting T-slot size and quantity, if unlisted, adds machining fees.
• Safety light curtain and PLC brand/model; low quotes often substitute generic or omit.