As noted here:
https://electro-music.com/forum/post-434679.html#434679
Added: Wait, look what @EddyBergman just posted today!
This seems to use a 5 V regulator to power the 4017, which means the divided clock pulses will be 5 V amplitude. As noted above, that won’t work with the Plexquencer. You’d have to substitute a 9 V regulator, or just skip that and use the +12 V rail.
The YuSynth divider provides 10 V outputs (or 5 V if you add the Zeners, not included in the stripboard layout).