This counterweight shaft adapter would be a great addition to your 1200GTO mount if you frequently use it as a portable mount! The stainless steel insert will reduce the chance that you will damage the threads by cross-threading when you attach the stainless steel counterweight shaft.
The counterweight shaft adapter can be used on all 1200 mounts (including early models) EXCEPT black 1200 mounts and mounts with 4K or 10K Step Mounted Shaft Encoders (used with JMI Digital Setting Circles).
Installation is super easy! Simply remove the original counterweight shaft adapter and install the new one. Keep in mind that both components were designed with a through hole into which you can insert an object (Allen wrench) to either loosen or tighten the adapter.