[Therion] Indicating passage height less than 1 foot

[Bill Gee]

I asked this question a while back and got no answers.  A new map I am 
working on really needs something that works, so I am asking again.

The problem:  When I use the Passage Height symbol with a value under 1, 
then it is drawn as 0 (zero).  That is not right.  The passage is NOT 0 
feet high!  It seems Therion rounds all values down to the nearest 
integer, so something like "=value [0.9 ft]" becomes 0.

I can fit through a 0.8 foot passage - barely!

How can the appropriate symbol be drawn?  Do I need to think about 
creating my own symbol?

I though about using a label.  Two problems with that:  First, it is not 
drawn inside a circle and so loses its meaning as a passage height 
indication.  Second, sometimes I need to use a value like "<1".  The "<" 
symbol has a special meaning inside label text.

Thanks!
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Bill Gee