Friends,
Had to replace our rectifier/regulator at about 530 hours. Dynon display of battery status dropped to below 13v with the engine running, charging fuse was okay, Jim indicated that this was not uncommon with this engine. Lockwood immediately responded from memory with Part #965 349 - confirming the frequency of replacement ($175 plus shipping). Replacement is really a two-person job - one in the engine compartment and one on the cockpit side of the firewall. The attached picture shows all the wires attached to the two bolts on the inside of the firewall (middle of the picture). Without taking out the Dynon display, it is helpful to have a shorter partner/contortionist who can work behind the instrument panel!
David