Has anyone had any experience surfing and shaping a RICK UFO style tail. The tail has a concave look to it. There also seems to be Vee behind the fin. What are the ride characteristics like and what does the tail configuration do best–if any at all. Is there a standard UFO tail shape or are there different concave configurations depending on the size,weight,dimension,etc of the board. I have seen one once at Rincon on a RICK surfbaord. I was impressed with what I saw in “drive” and “trim”. The board seem to really noseride fast. Thanks for any info.