Frame complete

The frame in now complete and planning the lower deck. I decided to go for the 'paint the side of the plank' method using a permanent marker. 

Regarding the decking pattern, I plan to use 3 step pattern. 

My dilemma is the following: 

The lower deck is split in two halves to make it possible to fit into the frame. Instructions say these halves should be first planked and then fitted on the frame. The risk is a joint might show running along the middle of the deck. 

The other option is to first fit the deck and then plank it in place, making the whole process more difficult.