Initially, I implemented obliques in my font using the ital axis. Since Figma provides limited support for the ital axis, I’m considering switching to the slnt axis. My typeface includes intermediate layers/masters for some glyphs along with alternate .italic glyphs and relevant substitution features.
Is there a way to smoothly migrate from ital to slnt?
The last time I migrated (backwards, from slnt to ital), I ended up losing all my intermediate masters, which is why I’m a bit worrying 
P. S. Additional question: are there any known issues with design software supporting the slnt axis?