Re: center tempo mark on barline?

[michael webster]

thanks Phil: I am trying to build a set of re-useable metric modulations - and 
I'm favoring the Carter-style in which the '=' is centered on the barline. I 
have a music function which creates the appropriate \tempo \markup (and midi 
tempo changes thanks to Neil Puttock) from 2 durations, and I'd like to modify 
it to have it centered properly on the barline. The piece I am writing is long 
and has many dozens of such marks so I'm hoping to avoid scooting them all 
around manually... thanks again michael