I had them for a few months now and I don't think breaking in is the issue (the 7F is already comfortable first time I wear them but the 7.5E is utterly another story)
the 7F is pressing against my 3rd and 4th toe at toe cap area, this usually happens after walking for some time. But when I try on the MH71 trial shoes (those black Oxford ones at GG), there isn't such problem.
I am given to understand that MH71 and TG73 should fit the same but apparently this is not the case? anyhow I don't have problem fitting on the most standard E last on EG, really dunno what the problem is...
i'm no expert and only know my personal fits in G&G lasts.
am I understanding that 7F in the MH71 fits the way you want but the 7.5E in the TG73 doesn't ?