CZ BRNO trigger

Hi all knowledgeable shooters
I have a Brno ZKK 600 in 284 win and I am wondering if the Timney CZ 550 trigger will fit in place of the set trigger there at the moment. The set trigger I have won't engage the fine set function and I have adjusted all parts as per the manual and still no engagement, I even bought a new set trigger (single triggers not available in NZ) and still no engagement. The info around the Timney trigger says it will fit the CZ 550 models, not sure if it will be able to be fitted to the ZKK 600? Any advice or experience shared will be gratefully received. I have emailed Timney in the US ten days ago and no reply.

Kind regards
Ruger7mm