For those who are using RDSS, here is the internal distance equalization table for Dirt surfaces (and the one used in Validator). As the distance increases, the final time gaps per half furlong rise from 6.4 to 6.6 and bounce around for reasons best known by Doc Sartin. Internal gaps also increase accordingly. Those who want to tinker with decelerations by distance, or try different distance cutback strategies will have the opportunity in the next version. (And those who prefer to stick with what works, can do that too.)
Note: RDSS and later Sartin programs don't project or extract distances to these exact times: they use the GAPS between the segments as differentials to actual running time segments (plus DTV and ITV adjustments), then project all lines to today's distance at a hypothetical, equalized norm (i.e. 'Sartin Downs', i.e. NOT today's track).
FWIW, here is an earlier 2014 thread which discusses the final time half furlong increments currently used in RDSS, and some challenges to existing equalizations:
http://paceandcap.com/forums/showthread.php?t=9805 (see my post #11)
Ted