For me, I now find getting the front nuts back on is the biggest rocker-box pain. Though, I think the technique I used last time is not too bad. I put a bit of heavy grease on the end of thin knife then laid a washer in the grease. This is not the washer that goes under the nut. Those are easy to get in place by using a needle-nose pliers . The washer on the knife is to support the nut from below the fin below the below the end of the stud. The washer protrudes up through the hole in the fin to support the nut while you turn it with one or two fingers.
Well, that wasn't even where I was going. I don't have either skinny or long fingers, so I have come to trust the comb. The important thing being to keep the cups down by holding the adjuster ends up with rubber bands back to one of top bolts. I stick the coated gasket to the rocker box rather than the head and this avoids most of the sealant smearing. Once I think I've got things in place I check with a small-diameter articulating mirror and a flashlight to look back up at the cups. (For the record, I know this repeats myself and others.)
Richard L.