I'm not sure what type of wax you are using, but I normally use LX 18's and 20's in that jar using GB 435. The 16's just wouldn't burn all the way down for me.
Under custom graphics, select seal. Once your in there, you can select the circle option and choose your color. Just clear the text so it doesn't show up. Hope this helps!
I have used 435 for several years and would not be able to use the cd14 either. I use the cd 12 & 14 in the jelly jars. In the square mason I use cottons, usually a 60 but need to go up to a 62 in the harder to wick scents. Hope this helps.
I have a couple that were leaking around the handle and just ran a bead of silicone right around the handle to stop the leaking. You might be able to close the holes off with that.
There are 36 cases to a pallet. I used to buy from Golden, but they don't want to mess with the smaller guys. Also they have a couple of distributors in the area that they would prefer you go to.
I use the 435. It's like other soy waxes, you can get a hard to burn batch. Be sure to test each lot #. I order it by the pallet, but sometimes I sub KY's 125 when I'm running low, and they are very similar.