I got a fat cord coming off of mine and just cut a hole in the reducer and then added tape over. My mogul base is still on which kills airflow but I didn't want to rewire my lamp.
Aluminum tape is very nice to have for many situations. It's really strong and reflective.
I have ducting on both ends, so i can get the end far enough for the intake to create the best airflow. It is a pain in the ass though (have to stick my arm down the ducting to reach the bulb), and I used alluminum tape so that I wouldn't break the glass, but this stuff naver wants to come back off once it's taped down.