Ptss,
You're welcome. I have used a daisy-chained front end for years -- iso transformer > power conditioner > power regenerator. I have tried all configurations and this is the optimum configuration in my system. I read a thread on another forum years ago -- I lost it, unfortunately -- where 2 other fellows discovered the exact same configuration for daisy-chaining their front end.
I have no idea how my medical grade iso transformer would compare with Equitech. All I know is that mine is from Block in Germany and is a very high quality unit -- rated at 1380VA which gives me plenty of overhead -- about 50%. It cost me only $300 and it does a wonderful job on SQ. It is an enclosed unit, by the way. I could not find it on the Block site or anywhere else.