Jerms got no idea about the bore but I am using 3 mm silica. That's got to be a factor. Also, having read the other thread you participated in, it seems I am using too low a resistance and should go for about 30-31 gauge. I will try both of these adjustments. Thanks 
Micro coils should have a small diameter, around 1.5mm, which would give you 0.9 ohm at 10 wraps of 28ga. Mine are a little bigger than "true micro" size since I use a 2.5mm wick, so it would be around 1.4 ohms. How big are you making the bore?
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