Oh I give up...
The 120mm Control Tech stem is going to elude me for ever it seems.
And after putting a Marzocchi Bomber on the Parkpre, I think it's going to need longer than 120mm anyway.
I'll take the 135mm stem,if it is 135mm centre-centre. If it's a 150mm that's been measured wrong, I don't want to go there again...