##
## Change current track gauge to track_width
## -----------------------------------------


 func const Xstart=         0.   # Evaluate the mean gauge of the track between
 func const Xstop=       1000.   # Xstart and Xstop.
 func const track_width= 1431.   # Define which average gauge you want to have.


 func mean_r2_init slask gauge_average spv_trac  Xstart Xstop
 func operp_init   gauge_dev= 0.001 * ( track_width - 1435. )