Hey everyone I'm new to the drone racing hobby and I'm about to make my first racing drone. I'm somewhat following the UAVfutures $99 racing drone build and following his "pro" setup which is going to cost more than $99 lol. I have a 3dr IRIS + controller (and the rest of the drone as well) that I want to use just to save some money on buying a controller( or radio I think they're called). I was wondering how I would connect that controller to my racing drone after I'm finished with the build? Would I need to remove anything from my IRIS or just connect the IRIS controller to the newly built drone? The drone I'm building is going to have a Racestar Star F4S ESC and flight controller in it if that matters. Like I said I'm super new to this so if anything I said is wrong or if I need to be corrected please do so, thanks in advance!