I'm afraid it's you who is wrong about the structure of your DP003 chassis. The engine mount of 0846 is in exactly the correct place for a P4 and is actually more in line with port 2, NOT 3 and 4 as you say. It's exactly the same as in the picture of P4 0856 which I posted. Your "perspective" (photography term) is wrong in more ways than one. There is absolutely no P3 engine mount in Karl's photograph. The engine mount that can be seen is totally P4, not P3. Besides, the forward side engine mount at the intersection of the multitubes, which is what can be seen in the picture, looks nothing like on your chassis. Your chassis has been built to meet a projecting engine mount lug from a 2 valve 312 F1 engine, which was similar to 412P cars and P3s, BUT (and it's a big one) the tube arrangement, which misses out the diagonal tube that extends from the mount to the back, on your chassis is like a P4, with the intersection of those tubes and mounting point in the position to meet the engine mount of the 2 valve 312 F1 engine, not the P4 mount position. P4s, as 0846 has in the picture, have a chassis tube extension with wing like strengtheners/stabilisers that extend and meet the engine block. The mounting points on a P4 engine do not protrude out like they do on P3s and 412Ps. What you say Mauro said at the time above proved he and his Racing Department, who built the real 0846, did not build your chassis. He has recently said after seeing the pictures of your chassis, which he hadn't seen when he wrote the February and March letters to you: "The rear portion of Glickenhaus’ fake P4 is completely new and these details couldn’t have been missed by coachbuilders that built real P4s. I believe that the biggest differences from a real one are in the front section." Karl's picture actually proves beyond any shadow of a doubt that your chassis is NOT 0846.