Add cowl flaps to a plane?

Hi guys,I am flying Dreamfleet's Cessna CM almost 98% of the time. In DF's model it has no cowl flaps. I a assume in real life it has them but I am not 100% sure. I have never seen a C310 in real life. Anyway I wanted to add them. I simply assigned a cowl flaps switch to an axis with FSUIPC which works fine. You can actually see the engine temp drop when you open them. What I don't know however if the temps are off now as I simply added the colling effect of the open cowl flaps without having the increased temperature rise with closed cowl flaps (someone understands this; sounds a little weird). Should I change an entry in the aircraft.cfg to compensate for this?The more important question is: Open cowl flaps induce drag. But none of that can be felt when I open them now. What if I would additionally map the same axis t spoilers? Can I add spoilers with the aircraft.cfg or does this require changes to the airfile?To make it clear I m not interested in the visuals. The function is all that matters to me.Any help would be highly appreciated. I love this plane.AlexP.S.: Sorry for the double post. I figured the post might amke more sense here.