Hi Niki,
I stay in East London.
The PR Optimus Prime is on my agenda for the future - it is however going to be a monster of build. I calculated it to be about 253 pages and if done on A4 it will cost me just over R632.50 (R2.50 per page) for the printing alone. Despite the cost, the plan is to definitely build it at some stage in the future.
After Bumblebee (or maybe inbetween as a change of scenery), my next build is going to be the anatomical head by Bert Simons (
papercraft anatomy head | bert simons),
followed by the Halinski F14 Tomcat (VF1 Wolfpack).
There is also UHU's detailed X-wing and BG Viper that I am still mustering up the courage to also tackle one day.
What's your building plans forward?