Perhaps you've been able to correct this issue. I had the same problem with various aircraft, trim was too sensitive in all directions. I read a post elsewhere regarding the Force feedback switch found in the misc. menu settings. By default, this is checked, I unchecked this setting and all my issue disappeared. I only bring this up now as I'm new to DCS (this year) and just found the discussion under the A-10 forum as I was having the same issue trying to figure out why the A-10 would bounce up and down/ left and right.
Again, if this is resolved for you, please excuse the interruption. If not, perhaps you can give it a try.
Perhaps you've been able to correct this issue.
I had the same problem with various aircraft, trim was too sensitive in all directions for the P-47/A-10/Spitfire. I read a post elsewhere regarding the Force feedback switch found in the misc. menu settings. By default, this is checked, apparently, this is active regardless of whether a force feedback device is attached. I unchecked this setting and all my issue disappeared. I only bring this up now as I'm new to DCS (this year) and just found the discussion under the A-10 forum as I was having the same issue trying to figure out why the A-10 would bounce up and down/ left and right.
Again, if this is resolved for you, please excuse the interruption. If not, perhaps you can give it a try.