, Morning Clemens... Gotcha now, It looks like they have used an available D-9 fuselage and just added a TA nose instead of going the very expensive way of making a new die to accomadate the longer nose TA.I think(not that familiar with the TA) the D 9,11 and 13 versions used the Junkers Jumo 210, engine and the Ta used the 213 version.Not sure about the short wings, and didn't they also have a slightly longer "plug" in the tail section? Any way...
If you decide to be brave and cut... No big deal. Get your self some good heavy thread (preferably cotton) score a line where directed in instructions (inside fuselage) with a good sharp #11 blade. You can make several cuts but dont cut through, this line serves as a guide, Take a length of thread and wrap around both index fingers and (after securing piece to be cut) start making a sawing motion on piece with thread,as friction increases the thread will begin cutting into plastic and follow scribed line. While making your cut, your thread will be "V"shaped, in otherwords, your hands will be slightly apart " about 6 in." and slightly below where your cutting so thread looks like an inverted V. Make sure not to use too much pressure (Thread will break) and use a length of thread long enough to pull approx 4 inches of back and forth travel. Too long a pull and the cut may begin to wander off line and too short and the thread will clog up and break easily. Practice first, and take your time and your cut will be clean abd straight, You will see what I mean when you begin on a scrap piece. Too slow and you get a tough cut, to fast and the thread will break and cut unevenly, Practice and you may find you like this method. I cut all sorts of things from rudders, wing flaps,canopys... you name it.
Hope this helps, Be brave, looking forward to your progress pics!
Doug (RR)