The gentleman I bought my last 444 from had manual clutch problems. He spent a good amount of money to have an electric clutch professionally installed. Didn't make one trip around his yard mowing and the belt messed up. Parked the tractor beside the shed until I bought it for $80 two years later. The pulley on the clutch was so far forward, the belt almost rubbed the front axle support. It will be cheaper in the long run to do what's needed to correctly rebuild the manual clutch than mess with an electric. One thing to look for is grooves worn in the shaft where the bearings ride. If the grooves are deep, it may hinder getting the proper adjustment. rather than fighting it over and over, pull it down to the shaft and start from there. Keep parts in order as you pull it apart. subtle differences in the pulleys make a big difference in parts order, especially the shims. Keep us posted on what you find.