Suggestion These poles too thick, it will cause sink mark The red ribs are too thick it will cause snk mark, suggest cut plastic and keep 1. 4mm at ribs' bottom 1.2mm at ribs'topSuggestion The red ribs are too thick, it will cause sink mark, suggest cut plastic and keep 1.4mm at ribs’ bottom, 1.2mm at ribs’ top. These poles too thick, it will cause sink mark