Yeah Gary used both designs it seems .The one you posted ususlly give no trouble to remove . The ones using the split collet are the trouble makers but the process is still the same for either one .
Gary was noted for changing things up a bit between production runs. I still like the engines though! Just curious, how did he maintain the hub in one location for timing with the split collet? I know that using a taper bore hub on a tapererd crank was common on many other engines, but the use of a collet was rare on gas engines, common on glo. Once a hub is seated on a tapered crank, it pretty much stays in place but a collet is prone to more a bit unless a lot of loctite was used.