Just a personal opinion so take it for what its worth. A log lift still isn't the best tool with a bad back. You still have to roll the log to the splitter and once split you have to catch the splits that have to be resplit, meaning you will endup lifting some wood off the ground. You will be constantly bending over and lifting. I put a winch and boom on my splitter several years ago. The lifting of heavy wood just got to much. With the winch, I can just walk over to round and hook up the log dogs without even bending over. I winch it up to the beam and just set the round on it for splitting. If the round is really big. I split pieces from around the edge without unhooking the log dogs, so I aint lifting anything for resplitting. If I was going to build myself a new splitter, I would most likely copy the
Eastonmade splitter design that splits the log across the bottom and then pulls the round back to finish splitting the top half. You wouldn't need as big a cyl to split the tuff stuff and every split would be of similar size. You handle the round one time and repeat the cycle until the round is done.