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Have you looked at the "Figure 4" Chart on page 6 of the Quanshi Ye and Paul A. Wiegert .pdf ?
According to what you're suggesting,

that chart runs from 1 decimeter radius or 2 decimeters in diameter, down to 1/100 millimeter in radius or 2/100 millimeters in diameter. 1 decimeter equals 3.93700787 inches, so that chart says:the particles are from 7.87401574 inches, down to 29 micrometers or microns which is 7.874015748031496 of 10,000ths an inch. MEAN size (average size) of particles are a radius of -3.29871 millimeters or 1.2987047244 inches, which is a diameter of 2.5974094488 inches. Mode size particles(there's just as many smaller particles as there are larger particles from this size) are a radius of 29.3205 millimeters, which is 1.1543503937 inches or a diameter of 2.3087007874 inches.
And IF just ONE particle is larger than 4 inches,
THEN their entire model is invalidated.

"Essentially, all models are wrong, but some are useful."
-George Box

You're trying desperately to appeal to doom, but it's sad and shocking to me that you haven't learned from your previous failures with regard to ISON. Look at what that model shows with regards to particle size as you approach the upper limit. It drops off precipitously. Now maybe that's completely wrong and we're going to be hit with thousands or millions of rocks the size of a house, but if so said rocks should be detectable and we will know the model is wrong. Now if the model turns out to be right and there was nothing to worry about, will you admit you were wrong and learn from your errors in always assuming that a comet means doom? That is the pattern I see with you, and you're making this forum look ridiculous. Sadly, I expect you will not learn from this experience either, just as you did not learn from ISON.

"One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back."
- Carl Sagan