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It is possible -> https://www.lfgss.com/comments/13364980/ & https://www.lfgss.com/comments/13365063/
(But yes dolan´s measurements could still be wrong)
Tldr: if all angles are the same "effective reach" progresses with Top tube length
svenhöek
Also true witchcraft how the reach shortens from size 56 to 58 when a longer top tube is applied, but angles stay the same :D