Whip grafting was my favorite graft with apples. I would keep the scion in the refridgerater until the in-ground stocks showed new spring growth and graft the still dormant scions on. I didn't both with the slit in the scion and stock. Just made the diagonal cut in both and put them together with masking tape. No bag, I was half way through the next graft by then. Success was near 100% from my first graft.
But pure citrus don't go completely dormant, so I haven't tried on citrus. But citranges , I think, go completely dormant in the northern part of their range. So citrange on tifoliate might work using the apple way.
I'm trying hard to graft citrus the way citrus people do it, but success rate is low so far.