I've been trying to test the limits of the RES on my UltraMax to figure out how long it takes to get a dry hit. With my vaping style, I'll average about 4-5 long pulls before I get a dry hit. The first pull will be great, but the vapor and flavor will taper off on successive hits until I get a dry one on the fourth or fifth pull. Over the past few weeks I've noticed that the RES performs better when I use an atty/carto that has a tighter draw so my goal was to find a way to further tighten the draw.
PROBLEM: I realized that there is a pretty decent gap between the OD of the atty and the ID of the RES chamber, and it seemed as though a lot of the airflow was being lost through this gap. I figured that closing off that gap would create a more efficient airflow and result in better movement of fluid from the RES to the atty.
SOLUTION: My initial idea was to wedge an o-ring around the atty where it meets the top of the RES. The only problem was that I didn't have the proper sized o-ring. After digging through my tackle box of miscellaneous vaping gear, I ended up using a carto condom. I just trimmed off the end and slipped it over the atty.
RESULT: This quick-fix has definitely improved the RES performance. As expected, it resulted in a significantly tighter draw because now the airflow comes solely from the 5 air holes located on the RES cover. Others may not like the extremely tight draw, but I love it....especially since I have yet to get a dry hit (or any drop-off in vapor/flavor production). I've gone through 2 RES refills since lunch, and every pull has been as enjoyable as the one before it. So if you have a spare carto condom lying around, give it a try. It only takes a minute and the results are priceless!!!
PROBLEM: I realized that there is a pretty decent gap between the OD of the atty and the ID of the RES chamber, and it seemed as though a lot of the airflow was being lost through this gap. I figured that closing off that gap would create a more efficient airflow and result in better movement of fluid from the RES to the atty.

SOLUTION: My initial idea was to wedge an o-ring around the atty where it meets the top of the RES. The only problem was that I didn't have the proper sized o-ring. After digging through my tackle box of miscellaneous vaping gear, I ended up using a carto condom. I just trimmed off the end and slipped it over the atty.

RESULT: This quick-fix has definitely improved the RES performance. As expected, it resulted in a significantly tighter draw because now the airflow comes solely from the 5 air holes located on the RES cover. Others may not like the extremely tight draw, but I love it....especially since I have yet to get a dry hit (or any drop-off in vapor/flavor production). I've gone through 2 RES refills since lunch, and every pull has been as enjoyable as the one before it. So if you have a spare carto condom lying around, give it a try. It only takes a minute and the results are priceless!!!