I test fit them, but didn’t take a picture. They work much better than the kit carriage castings, which were too low and caused the cannons to aim upwards.
Dry brushing is a technique to bring out texture and detail. You first paint your base color, then you get your highlight color and dip your brush in it, and then wipe it off on a paper towel until barely any paint is left on the brush. Hence the name dry brush. Then you lightly brush the piece you are highlighting with the dry brush. Obviously you want a wide brush for this purpose. The width will be determined by the size of the part. Then you will dip the brush in paint and wipe off on the paper towel and brush your piece again. It’s an exercise in patience and takes practice. But yields good results. Good news is if you leave too much paint on the brush, you can touch up with your base color and dry brush over it.