Can a Hogue stock and forend kit for the Mossberg 500 be fitted to a Mossberg 535? I'm told the stocks from a 500 will fit a 535 but some people are saying the pump grip on the 500 cannot be fitted to the 535 because the 535 has a different action slide tube. Has any of you guys tried to upgrade your 535 with a Hogue or Magpul forend?