i have two DS4 IPs that are said to work but not proven. also two PMDs that are supposed to be good. im thinking of selling atleast one IP and PMD but want to be fair with the price. i also have a complete 6.2 with a banks sidewinder kit i would like to figure out what it is and if its worth anything. im not sure if i could bolt my 6.5 heads onto the 6.2 and keep that bottom end as a spare if i need it or how i would go about figuring that out. any help?