Out of curiosity, if you press the remote button next to the TM751, does the light turn on quicker? I assumed that the SR751 simply echoed the commands it heard at the same time, but perhaps that's not the case.
Yes, the light responds faster when it's only communicating with the TM751. The SR751 definitely takes an extra second or so to relay the signal. Since I have a extra button on the remote, I went ahead & installed a second switch for an post light in the front yard
. I notice I have to wait an extra second or two after I push the #1 button before the #2 button will send a signal (so total time for both lights to activate is about 4-5 seconds). It could be either "waiting for the air to clear", or I just takes extra time to transmit since it's not on the same phase. This weekend, I'll try plugging the SR751 in to the same phase & see if that has any impact on response time. I figure the least I can do is be a test subject, after ya'll have been so helpful.