is this good appproach?

My goal is to thin out the hair on my arms which is dark and kind of longish. after a took some hair out I realised that there are also thinner hair. No my question is this. If I target only dark pigmented hair in all hair cycles and leave thin and smaller hair will this give me good results?
I also noticed that after I zap a hair with electrolysis it comes back but waaay thiner than it was before. What do you think about it? if tha hair comes back thiner does that also mean that it wont be that long?

Bump. I am wondering the same thing basically.

You are doing alright.