The same material is required for long and regular models. If your phone is 5 inches or larger, you can use the long model. The difference between the two models is that the lower platform of the long model is longer and the center of gravity is adjusted accordingly. The prints were bad because of the problem with the filament.
The following parts are required: 1x 25mm or longer screw 1x Nut You can watch the video for installation or use.