| I'm just wondering if part of the problem is 'how do you make a pen mechanism THAT fine?'. It could purely be an issue of mechanical engineering. Pens are made to a cost, and i wonder if the nuts and bolts side of things make it prohibitively expensive? I know that a pump will do 1/20th of a unit for bolus (and finer still for basal, I believe my Animas is capable of a delivery of 0.00125 units (minimum basal of 0.025u per hour, and it delivers that split into 20 even doses i.e. 0.00125 every 3 mins). However, that costs lots and has a precision motor / feedback from the motor as to exactly where the plunger is so it's possible. I wonder how possible it it to get accurate small doses in the confines of a pen?
Gary
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13 years of MDI
And then a little pump floats by
And now my pants are filled with tubes
That tangle all around my.... er .... knees
The hours I'm hooked up? All twenty four
And that's it for now until evermore
But I disconnect for up to an hour
For wonderful fun (and sometimes a shower) 
And when I 'suspend' it, it plays Barry White
And my wife knows she's in for one heck of a night
But only an hour of that night is with me
As an hour is all I'm allowed now, you see...
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