I'm about to change the blades on my 52" Lesco. Question 1) Can someone describe the proper method to removing the old baldes & installing the new blades? Do I need some sort of Block, or something to trap the blade from spinning while I tighten it? Question 2) Does anyone know what size socket I should use to remove the blades on my Lesco 52" Hydro? 5/8" ? 15mm? ?? ie) What tools are necessary to remove the blades ?-- without using an impact wrench.