A couple more pics for now.. this is where i'm at with it at this moment in time.

Yellow done on the right hand side.

Notice the orange section in the 2nd pic i have indicated with the black arrow, that is absent in the 1st pic..
It was necessary to create a 3RD small stencil to do this bit!!
When i was making the stencil for the yellow i realised that there was this section of orange that was impossible to incorporate into the yellow stencil, since it doesn't connect to the rest of the orange!  Originally i thought 'no worries i'll just cover this bit with masking tape when i spray the yellow'... simple i thought  
THEN stupid me, forgot to mask off this bit and cut it before i did the yellow, didn't i??  

i'd already made a small cardboard cutout of this, which i was going to trace onto some masking tape stuck on to the cab, so i simply used this and added the orange over the top of the yellow.. problem solved   (this had already been done in the previous post when i had taken the pics).