Page 22 Modeling a Tank: Assembly

Select all the hydraulic's and Mirror it over to the back fender. Result shown below.

Now if the plan is to just do a still image, and for this exercise it is.. we don't need those expensive treads.

Hide all the layers except the 'wheel' and 'fender' layers.

Select the tread that is hidden by the fender and Delete them. On the other hand, if the plan is to do some animation the treads shouldn't be deleted .

Turn the other layers back on and save out the file.