You seem to be having trouble answering questions. I'll try and clarify my point using words from your article:
The Surveyor 3 components supposedly brought back from the Moon were re-investigated in 2010 by Philip Metzger and colleagues.3 The researchers concluded particles the size of small grains of sand ─ i.e. with diameters of 0.1 mm ─ impacted every part of the probe’s surface in line-of-sight of the place where the LM landed.
Nowhere is the word 'sand' or the value '0.1' mentioned in either the paper you linked to, or the academic publication of it:
https://physics.ucf.edu/~yfernandez/psjc/fall14/177-nov21/20120000029.pdfWhere did you get your value from? It's kind of important because you rely on it a lot.
Scans made using an electron microscope showed how ─ apart from a few “shadows” ─ every piece of metal examined was entirely covered in pits caused by the particles. Most of these particles bounced off after forming the pits. Some, though, became embedded in the metal and were later chemically analysed.
If the surfaces of the components were entirely covered in pits, it is reasonable to conclude the particles striking Surveyor 3 collectively amounted to a layer 0.1 mm thick, perhaps more.
This is a complete crock. It doesn't matter how many pits there were, it does not equate to a complete covering. What density of pitting was there? What was their distribution? Even if there was a reference to sand (and sand has a very specific particle size range, the value you are looking falls into the category of very fine sand), you can't assume a complete covering of depth x when only a portion of an object's surface has been hit by particles of size x. It's like saying a house is flooded to a depth of a foot because a single bucket got filled.
With that in mind...
In order to have impacted Surveyor 3, this layer must have covered the entire surface of a disc extending out from the LM’s landing site and reaching to at least as far as the Surveyor 3 probe.
Erm...no. In order to have impacted Surveyor a particle needed to be entrained by the exhaust plume with enough energy and directional momentum to reach Surveyor. You are assuming a completely uniform covering of a layer that can be, and was, entrained by that plume and was capable of travelling that far. Not all particles would have got that far, not all of them were aimed at Surveyor, some would have gone much further.
What is the volume of this layer? It is reasonable to assume the layer would be thicker on the regions closer to the LM.
However, for simplicity a layer of dust 0.1 mm thick and extending only to Surveyor 3 will be used in the calculations. The volume of a disc with a radius of 155 metres and a depth 0.1 of a millimetre is approximately 7.5 cubic metres.
First you say that more material would be removed near the LM and then you extend the area of denudation all the way to Surveyor? Why the inconsistency? Is it so that you can massively inflate the amount of material you think was moved? Like this...
The researchers claimed the material that sandblasted Surveyor 3 can be triangulated to precisely the location of the LM. This means the material must have come from immediately below the LM. If 7.5 cubic metres of material had been displaced from beneath the LM, then some sort of blast crater would have been formed.
The value of 7.5 cubic metres is entirely based on a number you appear to plucked out of thin air.
The size of this crater can be calculated. The diagonal distance between the LM’s footpads is 9 metres. Therefore it is reasonable to assume the blast-crater had a diameter of no more than 8 metres. If the blast crater is assumed to be a shallow cone or a saucer shape, the depth at the centre would have been about 0.5 of a metre.
You've produced a value pretty much out of thin air assuming material to be removed over a 155 metre radius and then use that number to suggest there ought to be a big hole under the LM engine?
It's nonsense based on imaginary numbers. You do a similar thing in your Apollo 17 article, where you concede at first that the antenna is pointing the right angle to aim at Earth, then introduce all sorts of artificial caveats to suggest (with no good reason) that the dish could be pointing 5 or more degrees lower, and draw the conclusion from your mental gymnastics that this was the case despite the fact that we have live TV broadcasts from that rover that contain information only possible if the rover was on the moon.