Lumahing lawang geni kudu Gamelan lan resik, tanpa dents ketok utawa karusakan mechanical. Welding lawang geni baja kudu tenan, joints solder kudu roto-roto mbagekke, lan ngirim ora ana welding palsu, diobong-liwat, bocor welding, etc. Jahitan kudu tenan lan Gamelan, lan plywood ngirim ora. direncanakake liwat veneer permukaan.