And oh yes, if you're new here. Please visit part 1 and part 2 of Ultra Magnus below:
Video #1: Ultra Magnus
Video #2: Trailer Transformation
Video #4 : Final Merging
Photo set of Trailer Transformation
To compensate for the horrible quality of the videos above, let me make it up to you with the photos below:
Photo Set of Cab Transformation
The cab can be transformed while connected to the trailer (read: no partsforming) , but this will be a hassle and messy affair. So I've decided to detach the cab, transform it, and then reattach it back to the trailer original peghole to complete the robot mode transformation.