Gen Crown/Tube for Ceramic SMP?

[Guest machineboy]

Hi, long time lurker, first time poster.

 

I recently received my ceramic SMP from Trusty Time. It's a beautiful watch that works well and keeps time. The only downside to it is that the crown is very difficult to screw in. It almost looks like the tube or stem is too long, making it hard for the crown to "catch" the threads in the tube? Does anyone else experience this? I feel that soon the threads will be destroyed when I try to push the crown back while screwing it down.

 

I'm thinking of replacing the crown and tube for genuine parts, does anyone know which part/numbers I should be ordering from cousinsuk?

 

I've been inside a few of my watches a few times, but not attempted this kind of procedure. Is it difficult?