admittedly I am not a tourney bowler but seeing that breakdown of the pattern I would start going straight up 10 and see what result you get.
The reasone I say 10 is that it is what I call the oil line (don't know the right term) you have a little more oil inside and a little less outside so you have a little forgiveness if you miss a board either way.
Of course I don't know your style but that is they way I would start.
if you go by the 31 rule then the 43 foot pattern you should be coming out of the oil pattern at the 12 board. The trick there is what angle to use to get to that 12 board is determined by your style.
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