Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Thanks for the comments and help
This with key combinations doesnt always work on non english keyboards.
I found the little thumb switch on the Hotas. I fly with trackhat and its impossible to use that switch.
But somehow I started thinking and its the same as spoilers, so in FSUIPC I mapped the spoiler to the mixture lever on my saitek throttle quadrant. So now its incremental and very good. Its a great aircraft. Is the speed brake used for landing like spoilers on passenger jets?
I wouldnt have found out about the throttle lever if I hadnt posted. I would just have continued starring blindly on my screen. so thanks a lot.