In 21 / 22, you should be able to save your railing in 3 parts, a Complex Profile for the handrail, a Railing Post and a Railing Panel. Each of these can then be selected in the relevant parts of the Railing Tool.
One of the forum moderators. Versions 6.5 to 27 Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11