The reason the TPM were dropped was because MMC struggled to get them to work consistently. There was a reason why but I cannot recall exactly what it was. In essence, there were those who never had an issue and those who found them a pain in the backside - very few people fell into the middle camp. My first Aero had them and they worked perfectly; however, my second one never had them fitted and I've never missed them. The holes for the clock and the TPM were used to fit tweeters on the later Aeromaxs and subsequent Aero SS and Coupe.
