WAIT NOOOOO! The stupid scale line in the config only affects the attach nodes, you are looking for rescaleFactor, which isn't present in the configs and therefore set to it's default value of 1.25 (not 1 for historical reasons, up to .15 the standard part diameter was 1m, then they changed it to 1.25m when they added EVA Kerbals to get the proportions right, so existing parts were automatically rescaled). Edit: After reading the last page, it seems like you already know that... then why did you multiply with scale?