My back gets weaker as I get older and using my small truck as a work table makes life easier for me. Here I was doing an engine swap on this 250 Honda scooter. There is not much to say because the photos shows it all. Bike tie-down straps and two folding car jacks helped me secure and lift the bike.
If you don't have a bike lift but have a small truck or a sturdy table, you can use them though it may not look very professional it'll save you for back pains.