The 50 Orc Bowmen are divided into 5 units of 10 Arrer Boyz each. 20 of them (2 units) will be upgraded to crossbows. In 3rd ed Armies only one unit in an army can be upgraded to crossbows, the ally contingent can't have any crossbows, but in the mercenary contingent any number of Arrer Boyz units can be upgraded.
For the leaders and crossbow armed boyz, I cut off the left hands at the wrist, and drilled a hole into the arm, as the 3d printed hands have a ball joint. From the cut off bows, I scraped away the hand and cut a crude pattern to represent some wrapped cloth or something, and glued the bows to the back of the minis.
For the musicians, I printed drums. They come as one piece with the arm, so I cut off the whole arm from the mini and drilled a larger hole into the shoulder to glue the drum holding arm into.
I had some trouble aligning the crossbows boyz. I would have liked to glue all the arms in the position as the front right model has it, but that makes the crossbows stick out too much, so that the second rank would not sit flush with the front rank. So I had to angle up the arms.
For the banner bearers I cut off the bow, drilled a hole through the hand and inserted some brass rod.
Where the banner had a vertical bar, I glued that on with super glue first, then wrapped it in twine for both the optics as well as for securing it in place.
I also had 20 spear armed boyz cleaned up, so I glued them onto their bases, added shields (which do not sit where they should, when you consider the position of the hand, but from the front it looks fine), and built the command group. The drummer has the same drum as the Arrer Boyz (there is only one in the stl file set), the banner was build as for the Arrers, and the leader got an axe arm and a replacement head, that is supposed to make him look more imposing.
First six units ready for washing and priming.