that is the dimension I gave you, the tail probe. It is a "one diameter probe" as opposed to the stepped dimensions I gave you before for the nose.
There are quite a few patterns for paint schemes for that version of the Phantom, there is the 34079,34102,30219 over 36622 pattern for the USAF SEA Camo (in your instructions?), there is a different camo pattern and color set for Israel, the Flat Light Gull Gray over White of Japan, the overall ADC gray for USAF interceptors, and more modern versions for standard USAF that used to wear the Greens and Tan over Gray paint.
It all depends on what decals you have ,,,,,,,,,,if you have the boxing with all the spare pylons and weapons and the 5000th Phantom markings (kit # 1085), those Bicentennial markings for BT-245 are "SEA Camo"
If you haven't done one yet, the SEA camo is sort of fun to do, just lightly draw the pattern with a pencil,and mask and spray from lightest to darkest color. If you don't spray, you can still do a great job with a paint brush, just be careful of paint buildup at the color joints.
Rex