I think you are being a little miserly on the 1 hr employee time, since to lift out the old would entail disconnecting them. Without seeing the connectors that could be an issue. I can almost guarantee that replacements will be a little different in size (even with the same dimensions), is it a tight fit now? Then, lifting in the new, wouldn't require reconnecting them if you were going to do it, but are you expecting them to be reconnected and are you sure all terminal connectors are in good shape? No corrosion that needs to be cleaned? After my new batteries were put in I had to go back and remove all of the wing nuts (I don't think they are recommended anymore). I used stop nuts on mine. Time and expense for you? Also, do you want the old batteries removed from your saloon or are you going to do that? You only mentioned "lift out old batteries and lift in new ones". Could probably do that in an hour. I think you should maybe double that amount of billable time for a complete job. Good luck Best regards, *Charles* Charles Williamson m/v Nepidae Albin 43 Sundeck Nepidae.trawler@gmail.com MTOA 3927