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Calculator class for telescope track resolution using the General Broken Lines formalism. This small collection of scripts provides a simple interface for the simulation of telescope resolutions including the effects of multiple scattering in the telescope planes and the surrounding air. Features Error propagation of track extrapolation uncertainty using GBL Includes scattering in material, estimated via the PDG Highland formula Automatically accounts for air between the telescope planes Allows to exchange the volume material considered for scattering (Air, vacuum, Helium...) Automatic placement of the thin scatterers at correct positions Planes ordered automatically in z for correct GBL trajectory building Radiation length for some common materials are provided The scattering is correctly treated by using the total scattering material of the track and weighting the individual scatterer contributions with their respective material budget. With respect to the previous release, this revision features a corrected approach to calculate the impact of scattering material in the particle path. The Highland formula of PDG is to be evaluated only once not for the individual planes and their material budget, but for the whole particle track and all encompassed material. Then, the contribution of the individual scatterers to the trajectory kinks are calculated using linear weights proportional to the respective material budget. Hence, the factorial term in Highland containing the material budged is calculated per-plane, while the logarithmic correction features the total material budget of the track in order not to underestimate the total scattering.