If I ratio the nominal impedances [ie, 8 to 16] and back substitute into your 1K6a012dB crossover circuit for a Four-Pi Pro, I get the following values:

Woofer:
C4 = 5 uF
L2 = 2.0 mH

Tweeter:
C2 = 4 uF
C3 = 11 uF
L1 = 1.2 mH

Referrring to the thread below on 16-Ohm CD compensation circuits, we have:

C1 = 0.33 uF
R1 = 50R
R2 = 16R

Do these values work well, or have I missed something?

Thanks for help,
ccvogel