To my understanding, a variable font file is basically just a standard font file with some extra tables (fvar, gvar, etc.) that describe the design space, the deltas, etc.
Does this mean it's impossible to have different kerning information for different masters, given that kerning information is stored in a separate table with no copy-per-master mechanism?
I've got a variable TT file with no kerning information. I've also got a .fea file with a kern feature. I'd like to inject that kern feature into the TT file (with respect to the previous question, I'd like all masters to share the same kerning information). What would be the easiest and safest way to do that? makeotf? Decompile and recompile using ttx? If ttx, how do I safely add the feature to the decompiled file?