I just got a SP-01 Phantom and I love it. I love the SA action, but the DA I would like to lighten up. I've read that you can do some polishing and it will lighten it up, but I'm wondering just how much polishing will do. I don't mind polishing but if it isn't going to be noticeable or view-able then I'm not too keen on it. So do I buy and replace parts or polish? I would like to shorten the reset at some point, but that is further down the road. Also trying to do this on a budget while keeping the gun safe to carry.
I just picked up the same type gun and shot it for the first time this morning. Whether or not to polish depends a lot on what you want out of the gun and how much you'll be shooting it. CZs tend to 'self-polish' as the round count rises and some of the best feeling guns out there are guns that have no polishing, but higher round counts. If you are going to shoot 10k rounds a year through it, I would not worry much about polishing. But, if you are running 500 rounds a year through it, polishing can help a whole lot.
When I upgrade my CZs, I usually take a stepped approach. I'll start with a reduced power trigger return spring, along with the replacement trigger pin. Next up will be the short reset kit from CGW (this is the one for the Phantom). After that, I'll add a race hammer and possibly the barrel bushing and maybe I'll change up the trigger itself. But, for this new one, I'll probably just shoot it for a while and see what it seems to need.