I would like to thank everyone on this forum. The info on this site has been great and a true time saver when it comes to projects like this. I started with the need for a front grapple. I bought the ATI grapple and the electric remote valve from W.R. Long. This is a great setup and works perfect! But I still had the need for an additional remote in the rear for a HTL. For this I used an Eaton Cessna 2-spool from Surplus Center and a cylinder from Redland Hill (cut to 16 1/2"). The most difficult part of this project was determining all the fittings and adapters required. I will post the listing here to hopefully save someone the time and money if you want to add remotes to your 7510/ 7610. Here are some pics.
Grapple......
Grapple......