Finally, one of the tiny tabs that the 1st valve top cap holds onto has broken off after 2 weeks, and there appears to be no way to repair the tiny plastic part

The top caps of the valves twist off and I cleaned the cylinders and pistons

Then I snapped the top caps back on

Is there any way to repair the 1st valve top cap so that the instrument is playable again?Thanks in advance.

Tuning slides actually work as

But as a fun thing you can actually play, it does the job!The valves did need breaking in and cleaning as they were sticky out of the