Nice looking system.
I'm wondering why you have a Ripole and a TL integrated. If I read the picture correctly, the TL is used as a beam splitter based on R Sanders principles ?
Just wonder which FR is used for each part of the hybrid LF drivers.
In my own build I also use a selfmade Ripole dipole woofer but only a single one at the centre between the ESL. ESL are segmented wire type, fixed on steel grids (comparable to the plastic louvre type) but with larger cells of 44x44 mm. My system is tuned with a miniDSP as crossover and frequency control and crossover F of 125 Hz. System integrates very well.