In operating the SS mFPD, one of the first aspects noted is that it was comparatively much more robust and sturdy due to itsSS design. For example, the original quartz tube mFPD has holes drilled along its side into which SS worker flame capillaries are cemented. In working with it over time it was found that not only are these awkward to cover in a detector housing, but they were also inherently fragile and a frequent point of breakage in the device if it was not handled carefully.