Trebuchet CAD model from the following videos:
https://youtu.be/-gn2RGPqe_A
https://youtu.be/KpFTyE-wiNo
https://youtu.be/mjEpN5_31go

Dimensions of wood might vary depending on location of purchase, so the following hardware list will vary. Therefore, use it as a guide for how many bolts are required. The wood dimensions can be measured from the CAD model. The dimensions of the essential arm lengths are also uploaded as an image in case it's not possible to open the CAD model.

Frame Bolts - 40pcs M8x70
Arm bolts - 3pcs M8x60 bolts
Main Shaft - 1pc Dia=25mm Length=500mm stainless steel
Main Bearings - 2pcs 62052RS 25.4x52x15mm
Secondary Shaft - 1pc Dia=25mm Length=100mm stainless steel
Wheel Axles - 2pc Dia=8mm Length=600mm stainless steel
Sling Pin - 3D printed PLA with 2pcs m4x20mm bolts