I couldn't resist investigating a bit further as I got back and according to my calculations the distance between the Grey Havens and Rivendell ought to be roughly 200 leagues as the crow flies.
On
Hookbill's map the width of East Beleriand (100 leagues) appears to be a little bit longer than the distance between the Blue Mountains and the Misty Mountains (aprox. 200 leagues) which suggests that the Beleriand part of the map should be scaled down to at least half the size than as shown. I suppose it would be more difficult to assess the latitude position of the various places in Beleriand however. You do get the feeling that the locations are placed too far to the north generally though (and, of course, that they should be closer together). Fex. I feel that Doriath and Menegroth should be located to the south of the Shire and Rivendell, not north of it as on
Hookbill's map.
Hope you take this as constructive criticism
Hookbill, although it is a bit nit-picky, I know.