Problem with centered headings in @Tbl

[James Ramsey]

I have the following as part of my document:

@Tbl
        rule{yes}
        aformat{ @Cell indent{ctr} cragged @Break A | 
                 @Cell indent{ctr} cragged @Break B |
                 @Cell indent{ctr} cragged @Break C | 
                 @Cell indent{ctr} cragged @Break D |
                 @Cell indent{ctr} cragged @Break E |
                 @Cell indent{ctr} cragged @Break F }
        bformat{ @Cell indent{right} A | @Cell indent{right}
B |
                 @Cell indent{right} C | @Cell indent{right} D |
                 @Cell indent{right} E | @Cell indent{right} F }
{

@Rowa
        rulebelow{double}
        A{Pressure (MPa)}
        B{Hoop strain according to gauge 1 @E{({mu @R "in"}
slash @R "in" non ) &1.3m}}
        C{Hoop strain according to gauge 2 @E{({mu @R "in"}
slash @R "in" non ) &1.3m}}
        D{Average hoop strain @E{({mu @R "in"} slash @R "in"
non ) &1.3m}}
        E{Hoop stress (MPa)}
        F{Modulus of elasticity (GPa)}


}

Notice the "&1.3m" in the headings containing mu @R
"in" slash "in". The reason it's there is so that that
mu @R "in" slash "in" looks centered; otherwise it
looks right-aligned. The rest of the heading looks
fine and properly centered. If I change @E to @Eq, the
heading centers correctly. If I add text behind
@E{({mu @R "in"} slash @R "in" non)} (without the
&1.3m) it also appears to center correctly.

Thank you for your time.



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