Everything has it place at the ECF, just hard to find the directions sometimes. DIY usually refers to juice making here:
DIY E-Liquid
Then there's the modding forum which has sub forums for batteries, atomizers, tanks and cosmetics here:
Modding Forum
Then just in case you haven't got lost, they have a section with more sub-forums called assorted PV topic here:
Assorted PV Topics
Where you can find topic on attys, caro's, tanks, which means tanks with cartos in them apparently and rba's,
So it is really easy to get lost and to post things in not quite the right place. I once started a review on a new rba that I had purchased, and talked about it and the build I did for it in the review section of the forum. Apparently since I discussed the build in the rba too, it was moved to the modding section.
I pretty much rarely start a thread, and search for a similar thread on what I want to review, discuss or show off, and post there. Which I always try to do. since it's in the forum rules.
I've found certain areas of the forum by accident, when search some other members post, and then when going through the different forums, sometimes I can't find it. When I find something really good, that catches my attention, and something I want to learn more about and keep up with, I subscribe to it. That way it is always only a click or to away, no matter what section of the forum I am in.
Have fun with DIY, whether it's juice, building or cosmetics. Still a great place to be.