The Moebius - starting the underside

So, i had a good look at the underside detail of the upper section of the Moebius and very roughly draw the placement of them on the underside of the ABS sheet.
I'm in the process of applying sheets of Plasticard to that, as it'll be easier to glue the kit parts to it, and re-drawing the shapes onto that, and i've begun adding bits and pieces already.
I'm keeping the area where the neck of the lower section joins to it clear as its ABS too and i figure i'll have a stronger joining glueing ABS to ABS.