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It's been over a month and they replied with this and that excuses. Usually ships within 24 hours (Oh yeah.). That's what amazon said when I purchased it. Come on. I'll go and pick it up if you allow me.
The 100, 120, and 150 are the most frequently used.To tell you the truth, I rarely use the 320. The vacuum draw that leaks around the inlet, sucks up that last 1% of the dust coming off the paper. Over time, even that is a consideration. So technically you have a vac system that is actually a mini-part of a micron, invisible dust manufacturing plant. Instead of having cheaper paper that gives you the new disc agressiveness, then quickly to the used paper smoothness, which may be a grade finer, and miss the deeper lines from the coarser grade of paper in the previous step. I just went through over 50 boards of 80+ inch cedar, in three grades, and I only used about 10 sheets all combined.
That is about 3 for each grade. The advantage to quality paper, is that you can get in a groove with some consistency. When I first bought my Bosch 3727DVS, I bought a box of the popular grades; 80, 100, 120, 150, 180, 220, and 320. I had a body shop for 20 years, and after using the cheaper paper on the random orbit sanders, and winding up with a floor full of used paper, I can attest to the savings of using quality, aluminum oxide paper. I simply attach a 2 1/2" vac hose to the dust port on my Bosch, which is way smaller than that, so a lot of air escapes. It is still recommended to wear a mask because the shop vacs only capture to a micron or so. It is actually cheaper, in addition to doing a better job.
That way you don't wind up with a buggered edge on your sander. Local home centers sell the 5" variety, so if you are enjoying the additional cutting surface of a 6 inch, this is one of the best places to stock up. A good respirator, not a paper mask is advisable. Additionally the backing paper is stiff enough to do the job. The 6 hole paper is nice for the dust free environment. A fresh air system is even better. Highly recommended.
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