The trail with the current fork is 54mm,with leaders trackfork it would go up to 62 and using the moto fork it would decrease to 49(based on ht angle for the bigger 725s).Seems all in a reasonable range.French low trail bikes have trail in the low 30s.Thats 25mm less than the ideal 56 in the article.5mm up or down is not the end of the world.