Okay, well if you're going to have help right there, that changes the whole thing.
If it was me, I would start all over and treat them as if they had never been trained at all. Work on ground manners, tacking them up, getting them to where they give to the bit each way, ground drive them, etc.
I agree. Start at square one as if they hadn't been handled at all that way you are able to find and fix any holes along the way instead of dealing with problems that will pop up later as a result of the holes that no doubt will be there.
if grandpa is the great horseman why are his two horses wild ?
Not my question to answer but I can relate to the situation and your question a bit. My grandfather is a great horseman (bred, raised, trained many good horses, NCHA/NRHA money earners, AQHA All around champs, ROM, Superior horses) but like all folks, he aged and lost some of his ability to do the things he knows how to do and like a lot of folks I know was hesitant to admit that he couldn't anymore. When I took over the farm some years ago, there were a handful of youngsters that should
have been well trained solid horses by their age but had an owner that couldn't do what he knew how and didn't want to admit it and his horse granddaughter (me) was finishing college, starting a career and having a family in that period of time. Didn't make him less knowledgeable, just not able bodied enough to do it. He's well into his mid eighties now and could talk someone through a problem but heck, he can hardly walk to the barn and keep his balance let alone train one himself. Just wanted to say it can and does happen, even with very knowledgeable great horsemen.