These are three special tools that claim to install the A/C belt without rotating the crankshaft of an M57 engine. They are listed in increasing cost from roughly $100—$230. Quite a spread for tools that look very similar. Has anyone had personal experience with any of these tools? If so, was it on a 35d?

Kommen — $ 104.99 https://www.kommentools.com/products/bmw-v-belt-installation-tools-110330

KTC — $ 139.99 https://shop.ktcautotools.com/collections/bmw-tools/products/bmw-v-belt-installation-tool-m47t2-m47tu-m57t2-m57tu

AST — $234.5 https://www.pelicanparts.com/More_Info/BMW124057.htm?pn=BMW-124057-M1220&gclid=EAIaIQobChMIlbqiisrz4AIVDNvACh2iWQ4gEA YYAiABEgLvs_D_BwE

Thanks in Advance — Funf Dreisig