Most impressive work.
It is now more commonly known that after the first possibly 25-50 Tigers painted Dunkelgrau that early (pre-February 43) Tiger tanks were also basecoated RAL 8000 for the "Tropen" camouflage scheme. This Tropen or Tropical scheme was used in the North Africa campaign But was also used on some Tigers that were distributed to the Eastern front units such as Das Reich. Starting in February 1943 an order was issued for RAL 7028 dunkelgelb to be applied as basecoat.
It's your tank and its looking great so be happy with whatever color you choose. I like both base colors and match them to whatever time frame the tank I am building supposedly was in service with artists license of course.
My only comment about your Tiger is at the point you are at with the great details that you are implementing. Please consider removing the mirrored spare antenna tube on the engine deck as this is a detail molding error on both Heng Long and Taigen. At this point it wouldn't be difficult to do and would be easy to paint and blend before you go further with camouflage and weathering.
I used a razor saw-
As an aside note, here is a picture of the First Command Tiger "S01" of Das Reich where you can clearly see the horizontal spare antenna tube as well as the canted vertical "umbrella" antenna tube mounted on the Commanders side engine deck and rear plate. From what I've seen and read this modification was only done on this first Command tank and possibly limited others but I haven't seen any pictures of other Tigers with this mod. David Byrden and other Tiger Experts may weigh in.
Cheers to your great work.
"Charlie don't surf"- Lt. Col. Bill Kilgore
I removed the spare on the right instead of the left. 
