Reverse levers

Hi, I was wondering what the best was to set up Separate reverse levers for my saitek pro throttle quadrant? Right now I have the set through FSUIPC, as a direct to FSUIPC for reverse 1 FO one lever and reverse 2 for the other. Also, i was having the same problem when I had the reversers Assigned to a button, after I touchdown, I would press the button To activate the reverse thrust, it wouldn't activate, I had to wold the button for a while before it activated. I I usually reduse the throttles to idle at at 20ft for touchdown but I'm not sure, usually at touchdown the N1 it at 30% or so.