About Alternating glyph shapes

Hi, I am trying to make an alternative version of a glyph. The font has a light and a black masters. But in-between you get regular and bold. In certain glyphs as “k” i will take out the inner serif on black version, but it interpolate clumsy results in regular and black. Is there any way of editing the glyph on this axis plus the intermediate weighs without loosing the MM functionality? in the “Alternating glyph shapes” topic you can only change the master glyph not the interpolated ones. thanks,

In order to change the instances, you must change the masters. There are tutorials about multiple masters, and there’s a second one about alternating.