I sure ain't Pops, but from the photos it looks like Scott Casler uses Force One bearings/hubs on his 1/2 VWs. Another bit of info is that no one (to my knowledge) has been able to build a reliable PSRU for these 1/2 VW engines, the amplitude of the torque pulses (compared to a 4-cyl) are more severe. My guess is that such a PSRU is possible (after all, folks build airplane PSRUs for two-cyl BMW 1200 CC motorcycle engines, but the ones that work usually contain a clutch and some well-engineered dampers). I'd expect that pounding to be felt at the front bearing and esp at the "thin spot" in a conventional crank where the Woodruff key and the tapped hole in the end of the crank reduce the amount of available "meat," and that is where failures can occur. This has generally not been a problem with non-stroked 4 cyl engines. The Force One hub and bearing greatly reduces crank stress at this point. . The Force One Hub and bearing add about $200 over the cost of the shrink-fit prop hub alone. And, there is a cost to do the machining of the case for the Force One (but the e case will need to be worked on anyway at a shop if larger cylinders are to be used). It is pretty cheap insurance. FWIW, GPAS does sell a shrink-fit hub for the 1/2 VW. See here.