Thanks, all!
Here?s a few pics to show how I did the radiators.
At first, I scribed a piece of 0,25 mm plasticard with a Xacto-knife, I used a pencil and some smudging to see what I was doing.
IMG_0333Then I drew the guide lines. Some elements are practically without the gaps, so I just scored the dividing lines with a knife. After that I drilled the ends of the actual gaps to make the cutting easier.
IMG_0334After marking and drilling, I cut the gaps between the appropriate elements as needed.
IMG_0335Next I cut the radiator to the right size and shape, leaving the drilled end intact at this phase. I added the heat stretched sprue for the tubing, gluing it in place with superglue. Important to apply pressure to the radiator, that the elements will be at right angles and at the same level.
IMG_0336After that I cut the other end and added the other piece of tubing in its place in the same way. This will look pretty good after painting. I will add the supports to the backside and cut them to the correct lenght. Higher at the rear and shorter at the front. And then the rest of the tubing to connect the radiator to the engine. You will note that regarding the item at right, I did not cut it quite straight, so two of the elements are not long enough. I will glue a filler piece there later?
IMG_0337There is doubtless many other ways to do it as well, but at least this is definetly easier in 1/72 than putting them together from separate pieces.
Cheers, Skyhook