A few notes about fit-up work seem to be in order. The loops on the field frames of the original artifacts are described as being somewhat crude in terms of how close they all are to one another dimensionally. This is not necessarily an impediment to getting the whole assembly to lock up tightly if we are using wedges to hold the joints together. My reconstruction uses lugs that wrap around the tangs of the arched strut to trap the loops of the field frames in place, driving in wedges behind the tangs causes everything to lock up solidly.

This particular approach is the one place where my reconstruction diverges from the artifacts. It is a temporary concession needed to conduct some full power accuracy tests I have in mind. A more authentic joint utilizing the elongated holes seen in the original tangs will be substituted later. (The idea being that we will work backwards from the best group size possible, and see if the Roman approach using some kind of cross wedge system with those holes they put in their tangs, will degrade the group size.) It has been suggested that the Romans probably used hardwood wedges to lock everything together. I used some made of oak when I was trial fitting the parts together and they did seem to work okay. However, in keeping with the maximum performance goal of this project, I soon replaced them with steel and bronze wedges built around a three degree taper. The matching surfaces on the struts that fit into both the top and bottom loops, were also given a three degree taper. It would certainly not have been beyond the capabilities of any competent Roman armorer to have likewise used matching tapers to insure maximum rigidity in the final assembly. One thing is for sure, the loose and rattling nature of the eight juncture points where the loops and struts went together, instantly disappeared when well fitted wedges were driven into place. The whole assembly had the feel of being locked together with remarkable strength. In short, if the fit-up work on the wedges is done properly, the varying dimensions evident in the loops of the original field frames would not have affected the integrity of the final assembly.

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