Technically there will also be massive (impossible to overcome problems) with mutual interference between the listening kit and the transmitting kit!
but if you strip out the E3D kit back to basic airframe isn't it a 707 and then integrate the Rivet Joint Kit onto that 707 airframe. (Yes I agree the project management might be its down fall)
Yes Buy more RJ's for 32sqn to replace the HS125's & Bae 146's great idea