Jim,
If I may make a couple of suggestions for keeping things straight as I had one order of 60 cigars plus 10 softgrips two years ago and one hundred slims last year.
I cut each blank to length, got a lot of rubber bands to hold the pairs together. I did the same after I drilled them as well as after inserting the tubes. I marked the center band end of the tubes on the inside after turning them so I knew which end goes to the center during assembly. I bought ten sets of bushings and changed them after each set of ten were done and tossed the old ones.
I drilled two rows of ten holes for dowels in a board for the two halves of each pen to dry after finishing and assembled them before going onto the next ten. I am glad to get those orders but am also glad when they are done.
Good luck!