Tonyfreeman, the more in the market the better for consumers. One for you, Vonnen in California has complete kits to add hybrid power to Porsche 911, Cayman and Boxster. It adds 111kw via a front battery pack, a slimline motor/generator that replaces the flywheel and US $75,000. Very pricey but effective. Madmuz, that and the Crookes radiometer motor needs lubing. https://journal.classiccars.com/2020/02/11/electric-hybrid-retrofit-adds-up-to-150-horsepower-to-porsche-911/