Volkodav - sure sounds good, hope it works out for you.
Making progress here. Estimate 1/3 of 70s green shag carpet is now visible. Encountered many wayward decals during dig down to carpet level.
Noticed a relativity phenomenon: When clutter is maximum and deep with only about 5% of green shag carpet visible, progress is super slow because there is no maneuvering room. One must deal with every little item encountered (wheel, prop, decal, canopy, stand, receipt, etc) though you are unable to deposit it in proper location across room because you can't get there due to depth of styrene related clutter. Most goes to designated temporary holding boxes in hallway, some to trash can. Once a carpethead is established progress goes a bit quicker. There comes point at about 25% carpethead when you have decent maneuvering room and dealing with each item is relatively easier/quicker than at first. With this milestone reached relativity of difficulty (time involved) dealing with each item diminishes.