Had a couple F-15E's out there. Interesting aircraft. Reminds me of the Navy's attempt to hang on to the F-14 because they were looking to keep it in service longer!
-S
Notice how beefed up the upper body structure is over a normal F-15C!:
Here is the cockpit. I talked to the pilot about how comfortable those seats are. The answer is, he can stand about 45 minutes to an hour. Bad part is, the longest flight he has been on lasted over 8 hours! Ouch! Apparently they are solid metal with a thin layer of padding!: