That does look good @Hayhay congrats!!!! thanks for letting us know it does not take a Brain surgeon to get them working right
Does the housing for the SP5K seriously require a specification/modification exclusive only to the SP5K that differs from all of the other clipped and pinned housings that we use on our existing HK host guns? If so, would that render a SP5K housing incompatible with all other hosts other than another SP5K? And vice versa, no easy swap of trigger packs if involving an SP5K? What insanity that would be and yet another compelling reason to choose an SP89 over an SP5K, if this is the case. Surely not though, for what company would sabotage their own product line like this.
This is my experience your results may vary. I am not a expert by any means.
My 4 pos housing without the trigger pack installed fit my gun perfectly. However once I installed my trigger into the 4 pos housing I could not get the rear pin in.
I removed the trigger pack from the housing and opened up the top portion of the shelf cut out on the housing with a file. I will post a picture later this evening.
Mine did not take much.