I bought the AGA post insulators from Kidney Puncher for my RSST posts and it almost stops the bottom leaks. Still a slight seepage.
With temperature fluctuations and altitude changes the RSSTs don't leak as long as upright. RTAs are like clearos and the vacuum will turn to pressure and cause leaks. I ordered two AGA-T2s from 101vapes on clearance for 13.99 and two RSST adjustable air caps from
madvapes at 13.99 minus the 15% off holiday weekend coupon code. Not sure how the caps will work with two air holes but I have to try something to get rid of the whistle noise.