Whilst I don't want to give the game away completely, this is VERY similar to something I've been doing for several years, so just to help; add the following:
Firstly if at MR or SR back BOB (lux bet) i.e. best tote or Top Fluc. otherwise bet best tote/sp, or if country best of 3 totes; ok now:

LSW. yes but if Metro today then that win must have been metro and within 21 days.

selection must be running in a race less than 2000 metres and be pre-post fav. (always using the same source of pre post)