the TTSH v4 is the same Version like TTSH rev.3 - but with bugfixes.
The TTSH v4 is only available by synthcube - Kits, Fullkits, cases - mostly everything you want.
https://synthcube.com/cart/ttsh-v4
If you're looking for an assembled TTSh or you want modification, build, repair - Service- contact me
You need an account (free) on my website to see the older documentation and Modification Pages (to prevent the big B. company to copy our mods and ideas)
Known Issues:
the Pinout problem of the Dual JFET 2N3954 in the VCO2 section (mainboard) is still available.
Frontpanel - all holes must be enhanced by drilling. all slider cutouts must be reworked with a file 
that's not an issue, that's a problem for some users.
Synthcube was informed but still send this panels to customers.
In the Fullkits are many slider pins bend or the lever is broken or bend - you need replacements.
Build Guide from Antony "Fuzzbass" v1.7 (update 29.dec.2019)
added Midi Interface guide in v1.7
failure in previous guide: (1.2) corrected in 1.3 guide and newer
there's a failure with the 4012 VCF card, the capacitors between the matched 2N3904 must be 4x 0,01uF (10nF) C0G or polypropylene caps -
better to organise 1% Polyprop caps, you can mount it from the rearside too.