[OS X TeX] Make font larger

[Paul Fontana]

Now that my font is installed and working (see my recent thread), I 
have another question:  I am using this new font to provide a character 
for use primarily in math mode.  Unfortunately, Kaufmann's standard 
size is a little too small compared with the other (standard math) 
characters around it.  I can compensate using \large or \fontsize for 
simple expressions, but then the Kaufmann symbol doesn't change size 
dynamically like it should if I use it, e.g., in a fraction, so to get 
it to look right I would have to set its size manually every place it 
is used.  Is there a way I can make this font come out automatically at 
a size of 1.2 x (whatever TeX was going to use), or something like 
that?

Example:
\usepackage{bm}
\usepackage{amsmath}
...
$\widehat{ \text{\usefont{T1}{pku}{b}{n} {\large r}}-\bm{x}} = 
\tfrac{\text{\usefont{T1}{pku}{b}{n}  {\normalsize r} 
}-\bm{x}}{|\text{\usefont{T1}{pku}{m}{n}   r}-x|}$

Here, the {\large r} makes the r match the \bm{x}.  Then, in the 
numerator, I have to use {\normalsize r}, and the r in the denominator 
with no size adjustment gets shrunk by \tfrac and is too small.

Thanks,
-- pwf

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