Multi-bts with a single UmTRX

Hi I have an UmTrx -v2.3.2 and I am trying to implement the multi-BTS feature using Osmocom projects and a single umtrx, as outlined here https://umtrx.org/multi-bts-with-osmocom-and-a-single-umtrx/. However, I encountered some issues and couldn't able to get it working. in the spectrum, I only saw two single-tone signals for the two BTS. I am afraid maybe I am using the wrong branches of projects. I am not sure which branches correspond to the master branch from 2015, as the fairwaves' blog is from that year. here are my setup details: ubuntu 20.04 UHD (branch:3.9-LTS) UHD-Fairwaves(branch: master) libosmocore (tag:0.9.6) libosmo-abis (tag:0.4.0) libosmo-netif (tag:0.0.6) libosmo-sccp (tag:0.7.0) openbsc (branch:fairwaves/master) first osmo-bts (branch: fairwaves/0.3.0-fw-4, with ./configure --enable-trx ) second osmo-bts (branch:achemeris/2sector, with ./configure --prefix=/usr/local/special/2sector --enable-trx ) osmo-trx (branch:achemeris/2sector) I was wondering if you could provide more specific guidance on which version of the Osmocom projects I should use. Is there any additional documentation or resources that could be helpful in this regard? Thank you for your assistance, and I look forward to hearing back from you soon. Best Regards, Mobin