Are very large font sizes possible?

I am using a dynamically created TextField to display a filmstrip-style countdown, and I need a very large text size for the countdown numbers. I have tried:

textFormat.size = 900;

and also:

numText.html = true;
numText.htmlText = “<font size=“900”><b>BORK</b></font>”;

Unfortunately, either of these methods only sets the text to about a 96 point size. I have been able to adjust the size using the _xscale and _yscale properties, but this causes problems on other (Mac) platforms, as the text is scaled much larger than on my computer.

There is the possibility of using static text and controlling it with AS, but that seems afwully inefficient for what seems like an easy problem.

Any ideas?