In June 2017 fuzzbass released a new Addon for the TTSH, a Waveshaper circuit board with Suboscillator, your TTSH get with this board all waveforms at VCO 1 and VCO 3.
The Board is compatible with all TTSH Versions.
muffwiggler post:
https://www.muffwiggler.com/forum/viewtopic.php?t=180267
BOM:
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=34bfa098c4
Build Guide
my build:
i tested the waveshaper board for fuzzbass in a rev.3 Version and it works great.
The pcb is mounted on top of the VCF - on 2 Spacers mounted.
if you need help i can modify your TTSH with this mod.
the Panel was prepared with white transparent tape from the front and the drilled from the front - it was easier for me to setup/mark the correct alignment from front.
I used thonkicon jacks instead of the supplied jacks (with the pcb)
i only used the Suboscillator output jack and the Suboctave switch (no offset switch, external source jack)