Day 8 of the IBG Models Gotha Go 242 A kit build
Step 25 - adding the flaps and ailerons. These all slide into place beautifully, along with the elevator. Only I'm not too sure how to position them. Looks like the Gotha has flaps that are both inboard and out-board of the booms. See the ECPA-D photos below by PK Gremelsbacher. Note Gremelsbacher was KIA during March 1944 so his images are public domain.
A view of Steps 26 and 30 in the instruction booklet - the various PE details to be added to the wings and tailplane. That just leaves the steps covering the landing gear.