Incription problems..

A week or more back I set up my "inscription factory" consisting of a Inscriber and a banker that carry the stock inventory. The Inscriber hasn't yet all the recipes yet but she's working on the northend inscription research every day and I try to buy any Book of Glyph Mastery that I can find on the Auction House.

So far I've stocked up with 20x of each glyph that I have that would yield 5g profit. The problem is that I don't sell near as much as other bloggers do, that I read about. I've calculated my glyph thresholds in QA using the below formula:
threshold = (ppi + ppp + ahd + mp)*ahc
ppi = price per Ink of the Sea
ppp = price per parchment (Light=15c, Common=1s25c, Heavy=12s50c, Resilient=50s)
ahd = auction house deposit (12hrs=75% of Merchant Sell Value, 24hrs=2*12hrs, 48hrs=4*12hrs)
ahc = auction house cut (5%) (put 1,05 in the formula above)
mp = mail postage (sending herbs to my Inscriber and sending back the glyphs)

The ppi is calculated from milling tests where I've logged milling of item level 72 herbs as well as item level 80 herbs. To simplify a bit I've averaged the valued from these different types of herbs.

ppi = (pph*5) - (simv * asipm)) / aiotspm

pph = Price per herb
simv = Snowfall Ink market value (I've made an guestimate of what I could sell these inks for on my server)
asipm = Average Snowfall Ink per mill (measured to 0,26 by myself)
aiotspm = Average Ink of the Sea per mill (measured to 1,48 by myself)

These calculations give me the following break even price thresholds: (I'd love some comments about these calculations, especially if you can spot any faults in my assumptions). The below numbers are not my actual thresholds as I'd like to make a few gold out of my business. My thresholds have been between about 2g40s and 5g30s.

Resilient 1 ink	1g 33s 52c
Resilient 2 inks	2g 12s 02c
Heavy 1 ink	93s 83c
Heavy 2 inks	1g 72s 64c
Common 1 ink	82s 02c
Common 2 inks	1g 60s 83c
Light 1 ink	80s 86c
Light 2 inks	1g 59s 68c

I logged from the beginning to see how things went and here are the results:

...	Posted	Post BO value
10-03-27 16:01	334	...
10-03-28 11:21	341	...
10-03-28 14:16	306	...
10-03-28 18:17	247	2045g 21s 38c
10-03-28 21:54	266	2024g 46s 03c
10-03-30 22:09	270	1835g 73s 90c
10-03-31 21:51	265	2783g 80s 09c
10-04-01 22:42	247	1531g 75s 93c
10-04-02 21:57	259	1841g 44s 68c
10-04-03 01:03	367	2364g 73s 18c

Based on these posts I've also checked what my market share was after I've posted. It varies between about 4.5% and about 6.2%.

The sales been awful so far and I present here my sales:

…	Sold
10-03-27 23:40	182g 37s 94c
10-03-28 01:22	37g 51s 72c
10-03-28 18:17	61g 53s 09c
10-03-28 20:47	49g 34s 68c
10-03-30 22:09	281g 05s 71c
10-03-31 21:51	200g 14s 78c
10-04-01 22:42	69g 62s 10c
10-04-02 21:57	192g 66s 11c

I've found that not all of my competitors (far from it actually) differentiate between 1 ink glyphs and 2 ink glyphs. This makes almost all 2 ink glyphs impossible to compete with as they're priced as 1 ink glyphs.

With the above described scenario, what should I do to have my inscription factory lift off? Ideas, comments please...