Extrapolation serif version

I’m working on a serif version of a typeface.

I was doing some extrapolation on both files to a thiner weight but the results are not the same.
Already tried with 2.4.4 and with 2.5b
(The Master Weight values are the same!)

I believe I’m doing something wrong but I don’t know what. Any tip why this is happening?

I suppose the width of the regular or bold master is a bit different.

:joy: I had a mistake on my glyph n in the regular master. All other glyphs are ok!

I’m so sorry. You can delete this post @GeorgSeifert