as a beginner in type design I am super happy about the great feedback and advice I've gotten on the forums here. I have ran into yet another problem about workflow and conceptual design of a typeface family.
Initially, I have started designing my typeface's regular weight, but eventually would like to create light and bold versions. For any kind of different interpolation (Multiple Master in Fontlab, or some Interpolation tools or scripts) you seem to need the extremes, which is rather logical.
However, I've started with my regular weight. Designing the light and bold from it seems a reasonably graspable task. My question though is this: How can I use interpolation between the extremes, but also not lose my precise work I have done on the regular? Is there a way to define a third state along one Multiple Master axis that solidifies a particular transitional point, i.e. my regular between the light and bold? Or is are my worries unfounded, and I will be able to find an "accurate" enough state resembling my regular between my extremes, which will be both designed based on the regular?
What's your approach to this, what are experiences in a similar situation? Do designers usually start off right away with light and bold only? Also, any advice in general about creating additional weights is appreciated.