Joined: Aug 2010
Posts: 12,760
Likes: 2,117
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
A quick comment on Komoot. It has occasionally given me strange routing that adds way too much distance. When that happens I add a point to my routing that is somewhere logical between my starting and ending points so that I am forcing the routing to pass through that point, that usually fixes it.
My Garmin is an non-cycling version, so I can't answer any of your questions specific to the GPS, but Mev has done this a lot so he knows what he is talking about.