Trim question

Hi there!

After a longer break, and the release of DCS 2.5, I reinstalled the sim, along with the Huey.

I love flying helis (in XP as well), and I use a Saitek X55 with a removed spring, so it doesn´t have any centering force. The trimming method, using a hat switch on the stick would probably be the appropriate one, right? Which kind of trim setting do I have to chose in the setting menu for this kind of setup?

Thanks a lot in advance for your input!