When I riveted the skins to the front spar I first did maybe every 10th rivet before doing every other rivet down the line. I have no idea if it was actually necessary to do it that way or not, but I figured it couldn't hurt anything. I'm not finished rivet the HS yet but it looks pretty straight so far. It seems like since the front spar rests on the nose ribs that things wouldn't line up properly if there is a twist in it, but don't take my word for it.
The best advice I can offer is that when you get to bottom side of the stringers where you can't see the rivets while you buck them, don't forget about this bucking bar if you have one:
I did 3/4 of those rivets struggling with my tungsten bucking bar, hoping I was properly positioned on the rivet that I couldn't see before I remembered I had that other bar. It made the last several rivets a piece of cake.