Hardline Tube曲げ加工。PETG(Polyethylene Terephthalate Glycol・easier・130-150℃・$15/m)・Acrylic(Plexiglass・brittle・higher temp 165-180℃・$25/m)・Brass(metal・professional・bend tool有・$50/m)・Heat Gun + Silicon Insert($30 kit)・Bending Mold(Mayhems Bending kit・$45)・90°/45°曲げ典型・Inside diameter ID 12mm/14mm OD・PETG Hard Tube初心者向け推奨・3-4回練習要・cracking risk Acrylic高・Tube Bender機械($200+)・PrimoChill Vue clear coolant・Mayhems Pastel・2026年 Hardline Build YouTube映え定番、PETG主流。