ZWO EFW threaded adapters interfering with filter carousel

[AstroAndy]

Hi Folks

 

 

I have bought 2 thread adapters for a ZWO EFW 7x2”.

 

 

Now I find that somehow the threads have too much inwards travel, ie., the thread part is slightly too long & interferes with the filters moving.

 

 

There is a scraping sound, and carousel tries to move, but can’t,  not very well, or it won’t stop moving, trying to find the filter position, not succeeding, or filters get stuck).

 

 

Is there something I can do(eg. A thin ring, maybe 2 mm, that stops the adapter going too far in, or is there a way to move the carousel)?

 

 

I have attached a picture that shows the problem.

 

 

Regards