60/40?
I've never heard of the 60/40 under discussion.
But I can't think of any form I use where my primary hand does not do most of the work, except for those forms where it does all of the work.
I can't be the only one here who finds the 1911 to be a very mild frame, when it comes to recoil? My 10mm is only slightly lively, and my .45 CBOB is a pussycat. It's not that I'm immune to recoil - I don't particularly enjoy .44mag or higher, and I don't care for lightweight .357 snubbies. But my first non-.22 handgun was a .357 GP100, that I used to mostly shoot mags out of, so .45acp just never really seemed like much.
WC145, I'm not trying to say you fell off the turnip truck. But if you are now limiting your statements to what works or doesn't work for you, so much the better. At first, you said
You can't get a strong and secure one handed grip thumbs high.
To me, that read like you were speaking for all of us, not for you, but that doesn't mean it was your intent, and I'm happy to give you the benefit of the doubt.
I don't remember ever seeing a turnip truck in Maine, by the way. Potato trucks, and even lobster trucks, but I don't remember any turnip trucks. (Grew up near Augusta, and did a stint at Brunswick.)
Not sure where in Maine you are, WC145, or what MA you practice. But if you're near Portland, and are remotely interested, there's an aikido school at 226 Anderson Street where you could probably get the instructors to demonstrate some handgun takeaways. I have a few cop friends, and most of them weren't impressed with the retention training they received via academies and departments - which is why I met most of them at aikido or jujutsu schools.
Cheers,
M