the TTSH v4 is the same Version like TTSH rev.3 - but with small bugfixes.
The TTSH v4 is only available by synthcube - Kits, Fullkits, cases - mostly everything you want.
https://synthcube.com/cart/ttsh-v4
Known Issues:
the Pinout problem of the Dual JFET 2N3954 in the VCO2 section (mainboard) is still available.
Build Guide from Antony "Fuzzbass" v1.3 (updated October 2019)
failure in previous guide: (1.2)
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.