There is no point spending money on a crank that has been checked for alignment and then hitting it with a hammer to fit it! 
 This drive-side crank fitting puller tool allows you to safely and easily pull your crankshaft into place. 
 Simply fit the tool over the crank on the drive side and use the drive sprocket bolt to pull the crank into the bearing.
 
Another innovation from MArk Broadhurst at MRB