Hey Zoo!
Got the Quik Clamp... amazing. thanks for that!
We do a TON of sub truckers. Ill tell you that I train everyone to get a lint roller, and lint roll the white fronts prior to pressing. that is where the speckles come from. Lint from the poly parts of the hat. If lint rolled properly they come out clean and perfect.
If were doing the full front, some of the guys flip the cord out of the way, so that it is over the foam part, and out of the way. That allows them to put the transfer all the way to the bottom, and when pressed and put back into place, it covers the gap where the transfers die off.
Other than that we do generally press them for less time, only around 10-15 seconds at 400 degrees to avoid yellowing, but that may be the brand of cap we use which is value Cap.
Hope that helps brother!