Thanks, Spiros for your comment and encouragement.
Thank you, Louis for the detailed response on the build and for your suggestions. I am also really grateful for the walkaround. It will be a big help for the nose bay and gun pack detailing as well as for the cockpit. As for the seat, I did finally find out what the thing with extra straps is called and its probable function (see my response to Erik and pics, below). I am tempted to keep working on it, since there was a related harness system found in the 1950s era F-86. It was definitely fitted in the KK-1 seat of the MiG-15 and Polish Lim 5 at some point.
Thanks, Erik for your suggestion that the belts were for a parachute, rather than a seat pad. It got me searching more efficiently on Google until I found the exact thing I was looking at for sale on eBay.
I also Googled further on how parachute harnesses were attached to seats, starting int he 1950s, so I got some related info on the Korean War F-86. The main thing for me as a modeler is how the harness makes both seats more convincingly detailed as ejection seats, instead of as mere old fashioned seats. Pilots of Cold War jets were apparently tightly strapped with their personal parachute/harness connected to risers on the ejection seat (and still are). The "IPS" ("Integrated Protection System"? Integrated Parachute System? Independent Parachute System?)) here is clearly shown fitted to a Mig-15/Lim 5 KK-1 seat. I reason that this is not just a modern addition in that parachute harnesses from 1950s US planes look very similar to this Soviet IPS.:
. It is also found attached to the F-86 seat in some museum examples.
Pretty slim reasoning, I know. Pics typically show the harness attached to the body of the pilot in US cases.
--- pic7 not found ---
But the MiG-15 shows at least part of it attached to the seat. As i mentioned in another post, I would like to have a harness on the F-86 seat as as well, since it really adds interest to the all black interior.