Glad to hear of your success!
I don't proclaim my methods to be the best or the only way to do it, but they have worked great for me. The point is to find what works best for you. Some vapors prefer the condom fill method and some prefer dripping from the top. I prefer my methods in my blog because you are able to begin vaping right away; no need to let the tank "settle".
If you are comfortable with a particular method but are still having issues, consider altering your vaping technique. Slow down, take slow longer pulls.
There are minor differences in carto brands. Smoktech's have a less dense filler, so they may flood more easily. Boge's have a denser filler, so they may wick slower and may lead to dry hits or a burning taste. If having issues with a particular carto, switch brands.
Oh yeah. I know a lot of this stuff is trial and error, and all of it has some element of personal preference.
I am on the lookout for some of the Ikenvape cartos, but apparently is everyone else on the planet as they don't seem to be available anywhere I have found.
I have been looking for other cartos to try with this XL tank that I have, but the XL versions seem to be a bit more difficult to find pre-drilled than the standard versions.