I have been buying HBI stuff bit by bit recently, and every time I buy something, im so happy I buy something else.
The trigger spring kit is essential. I have a newer gun without a welded pack, so removal was easy. With the right tools, a vise, punches, and a little bit of patience, it's not bad. Just watch the video. Ditto with the Theta Forward trigger. Fantastic quality!
I am waiting on my Paske grip from them, ordered today. Looking forward to that.
I do have one OCD hangup though with the charge handle. The Theta charger doesn't really match the trigger. The trigger is flat, angular, and has three holes lined up. The charger is rounded, with three holes in a crescent. I am toying with getting the Delta handle, it is a lot closer.
I will also wind up with a duckbill too.
I wish they made a red Theta Forward trigger for the CZ 75 SP-01. Maybe a hammer too. That would be the cats ass.