Re: mathematical calculation tracker field
apologies to all, will experiment for min. 5 days before posting (3 days is not enough).
changed two numeric field names to: 'moto start' & 'moto end'
what worked: (sub motoEnd motoStart)
documention doesn't mention anything about:
- no spacing
- capital first letter of next word in title
use of field numbers (i.e. f_338 and a brief example under the formula entry location) might be more consistent with those used in other types of tracker options and increase user friendliness for those experimenting and growing their Tiki knowledge 
Mike
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