If you haven't already, you will probably get more responses if you post your question at HeliFreak:
https://www.helifreak.com/forumdisplay.php?f=62
I have learned tons there, and gotten through many issues with my Blade 230S from that forum. (Not problems with the great heli, but programming issues, etc.)
And as mentioned above, you need to fix the problem in the programming, and not with the trim levers on your TX, which are not used on heli's like they are used on airplanes.