Here's my collection. The two on the left use unmatched trannies; the right two use matched. The all use Wima 2.2uF/Silmic II and 4.7uF/16V C1's, and Nichi UHE 1000uF/16V at C3.
I will keep the last two, and plan to send the first two on to new owners eventually.
This one uses Nichi 470uF/16V UKA's and Wima 1uF for C2 to drive low Z 'phones.
Silmic 100uF/16V and Wima 1uF here at C2 for high Z 'phones.
This is my NHB unit for low Z 'phones. It uses 470uF/16V Silmic's with 4.7uF Wima's at C2. Since the Silmics are so large .......
.......... I had to mount the Wima's on the SMD side. Because they are thicker, the tin lid doesn't close all the way at front, but does latch at the back.
This is my NHB build for hi Z 'phones, and uses 47uF/16V Silmics and .47uF Wima's at C2.
FWIW, I much prefer the sound of the Silmic's to the UKA's. The UKA's sound thin to me, with a forward midrange that can sound a bit 'shouty'. The Silmic's are much smoother, but still give plenty of detail.
Sorry for the poor pic's from my old camera. My photog skills aren't that great either.