All my research was best of three perceptor and as I became aware of how the machine rated ties, I converted to the 1-T2-T2-4 ranking.
The only problem I had with some of the perceptor lines was when they would use a race with an adjusted speed rating of say 85 from something other than line 1 (young/improving horses given more leeway), where 77 was the previous high from the last 10 races. I just assumed that the track variant from that day was off. In my own handicapping I try to use a line closer to what the horse usually runs.
Your observation on last two being best for older horses and not repeating because of likely form cycle issues (my interpretation of your words) is interesting. I will have to look at that relative to results to see how it stacks up. Nice angle.
Bill
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