The FIRST control target that I have is named: "First Ctrl Tgt _Any lpi.eps" which suggests that it can be used for any lpi.
If you need to make them smaller, don't scale them but you can crop them so:
If that won't work then you could use a different target that has the same functionality (e.g. horizontal/vertical line slur targets)
Every element being printed provides the same information regarding slur and over impression pressure setting it's just that these colorbar QC targets show the problem more dramatically and quicker.
If you have different slur indicators for different screen frequencies it may be because the impact of issues like slur is related to the line screen ruling. Put another way, as you go from coarse to fine lpi the halftone dots become closer together. If the slur amount is an equal distance for the fine screen and the coarse screen, e.g. the slur length is 60 microns, then the visual impact of the slur will be greater in the fine screen than the coarse simply because the dots are closer together and as a result there is a greater chance of them touching and joining than with a coarser screen where the dots are far apart. I.e. It's the width of the gaps rather than the width of the lines that's important. There's probably a ratio of the width of the gaps relative to the length of the slur but that's math and does not play to my strengths LOL.
I hope that makes sense.