I have an AD 600 Pro strobe that has the Bowens mount and comes with a reflector that is 3" long and 5" across. So far I have been using it either with an umbrella or Bowens mount soft box. I would like to start playing with gels and directional light. I can not find a Bowens mount barn door. It appears that they are either held on with 4 set screws or lock over the reflector flange with a spring latch. All of the clip on barn doors seem to fit 6.5" to 9" reflectors with a flange. As the AD 600 Pro does not have this, do I also need a 7" reflector or is there another option? Are barn doors and gels typically used together? I see lots of kits that come with barn doors and 4 color plates that "snap" into the barn door. What I can't find is how to use other colors with these sets. Do you just cut out the original color then use it for a fame to hold whatever color you choose? I see many images of gels just "clipped" onto the flange of a reflector. Again that is not an option with the Pro, could I just gaffer tape the gel on? How much space is needed for air flow? How much space can there be around a gel before the white light over powers the color?