Hi Philippe, It's so nice to see you again. I've been wondering where you are. Thank you very much for sharing your DIY Stax connetor. I'll try to source something similar here in Thailand. Since you are here, may you comment on my idea? I've been playing around with the idea of making a 3 stators and 2 diaphragms headphone. I've actually made the design and cut the parts. I'm going to cut the enclosures soon. What do you think? The size of the stators is very similar to that of Stax 407. I make the two outer stators from single sided PCBs. The middle stator is made from a double sided PCB. My spacers will be made of 0.5 mm plastic. I expect that this design will yield much better efficiency and hopefully much better bass than the conventional single diaphragm design. Wachara C.