Still not 100% yet, but labor4 has sent a pull-request to JoshDi which has improved the supported functionality, so thanks alot labor4 for your time and efforts and we're almost there it seems
Anyway, i've just built and tested it, and now you can see all the libtorrent-settings in the GTK-GUI's preferences-dialog and can select presets(e.g. high-performance-seed) and can also enable/change options that needs values, either numbers or letters, but unfortunately the only thing still lacking is enabling options which just are either enabled or disabled with a checkbox, as you can select the option in first row, but not enable the option in the "selection-row". In short, everything works, except configuring boolean-options(yes/no-type ones).
Also, there used to be a ltconfig-plugin related error displayed on terminal when starting deluge from terminal, even though the plugin still worked, but now there's no errors shown.
I have uploaded the built plugin from labor4's fork here: http://s000.tinyupload.com/index.php?fi ... 5889759453Here is labor4's fork's relevant branch: https://github.com/labor4/deluge-ltconf ... gtk3_py3.7
Edit: JoshDi has accepted and integrated the pull-request from labor4, so now we can focus on JoshDi's fork and repo again - I haven't rebuilt and uploaded the plugin, because the code is identical to my previous build and upload above.