I am replacing the kona with a sanger superjet.so I have a few questions .First off the guy I purchased it from called it a 17' 10" and not an 18' is there a diferance? #2 will this boat respond to a set back pump? And last has any one put full stringers in one and any pics. My intentions are to clean up the bottom and do a quick paint job then transplant all the goods from the kona to the SJ. Thanks.