The range of guides for the Asterion Ecliptica equatorial platform allows the observer to best match the kit to his or her observing location. In the latitude range of 40-60 degrees, the guides are available in 2.5 degree increments.

When selecting a set, one should choose the closest index to the latitude of one's observing site. Since changing guide rails is easy, you can easily use the same platform in different geographic locations with different sets of plates.