Clink, I’m 6’1 and the large fits me fine although I do use use a lay back seat post with the standard stem (60mm I think) as the ETT does seem abit short for me with a 740mm bar.
What do you currently ride? I also have an 18″ Stanton Slackline which is def smaller but suits the hardtail chuckability. The larger Trigger feels more at home being a full wusser.
You can easily swap out stem, bar and seatpost to fine tune your sizing either way if your on the cusp of both a medium or large.
You get one though – so much bike for the £ and excellent to ride up and down