I'm super new to FME. I have lots of GEOTIFFs which I want to convert to JPEG, which works fine (as seen in the picture below (without the Tester)). But now some of my tiffs have 3 colour and some have 4 colour bands. If the tiff has 4 bands, I can easly remove it. But if it now contains only 3 colour bands it won't run. Therefore I tried including something of a "if more than 3 colour bands then remove them, but if 3 or less then just transform them."
How do I insert this conditional selection?