i'm still not following all the splicing stuff. take the whole thing off cutoff the last 25' (not the end with the hook) and put the fitting back on the end or a new one and connect to the spool and under load (tree) tighten the line back on the spool. Before winding back in wrap the first 6-8 wraps as tight as you can by hand. i would never trust splicing the rope to the hook by myself, i would send that in to have it done professionally, that is just a big accident waiting to happen. I know the kickback is minimal on synthetic rope but if you are using your winch to go up an incline and it snaps because of the bad splice you don't want to go backwards hurting yourself or others. If you cut it at the connection point to the spool you have are using just a shorter version of same rope without the side effects of splicing the hook.
please tell me if i'm misreading this whole thing.