OSC message replace and scale values

Hey all,

Need some help on something that seems easy, but gives me headaches.

I'm trying to rebuild an OSC string into something else. That new message contains the original address and the value (a list containing two floats) needs to be scaled. Something like this:

/thispartcango/x 0. 0.

into:

/newpart/x/coordinates [scaled]. [scaled].

Could someone advise?
My main problem now is that I get in trouble with the timing when - for instance Qlab - sends out a lot of data 'at once'...

Thanks