[FrankenMauser]

My opinion is only my own.
But I have found, over the years, that people who have problems with their fingers getting jammed/bashed into the trigger guard(s) fit into two categories:
1. Unteachable/insufferable double-action shooters.
2. Really fat/big hands.

If you don't have big/fat hands, it is a technique issue, in my opinion.
The fact that you find that particular "birds head" grip suitable tells me that you are probably an insufferable DA shooter. -- No insult intended. It is a very difficult thing to unlearn, if that is the only grip that you've known.