scaling problem

[ed miller]

I am restringing an entire piano for the first time.

I have encountered a unison with 2 different sized wires in it (sizes 15.5 
and 16). I am sure that this is the case (ie, this is not due to an 
incorrect mesaurement).

My question is....what are my options for restringing?

The piano I am working on is my own project for learning purposes. I am 
trying to spend as little money as possible (so I do not want to pay for it 
to be rescaled... besides, isn't it too late since I can't take approriate 
measurements with it already de-strung?).

Should I restring it the way it was? Should I add some single strings to 
make all unsions contain the same wire size within themslves? What 
else.....?

Thanks in advance.
Ed