modular Woodlog Trailer with rotating bogie

Based on the trailer with bogie ( Trailer with rotary bogie ) I have designed another trailer. This time for logs with variable length. M3 bolts and nuts are required. Furthermore 8x ball bearings for the wheels: 8x12x3.5 and one ball bearing for the rotating bogie: 18x12x4 The assembly can be seen in the pictures. The length is variable and depends on the number of connecting struts and couplings. The important thing is connecting struts = number of couplings + 1.