IMO the three on the market (flat pack , bethel Rhodes and peststop ) need tweaking to get them just right, and we all tweak a little differently to achieve that ?.
Yes trig it’s into main, the aco runs into the building so I can wash that out if needed, don’t forget to put a low back p trap or simular to stop unwanted smells or guests from the main.
She’s this years kit and hasn’t had a outing as yet, brother to her works deep (7ft dig first time out ?) . She’s handleable but not silly tame. Yes I’ll sort some pics of kennel ect.