You should consider doing the Pro Package yourself! You will learn a lot about the functionality of your gun and it can be done in about a day. I’ve helped friends do theirs, and it takes me about 2-3 hours.
Ask for the Production Legal Package and you will be okay for IDPA SSP and USPSA Production Legal. You’ll get a CZ-UB Competition Hammer and a 85C Trigger, which are all SSP And Production Legal parts. If you get the 85C Trigger with the pretravel screw, don’t use it/set the pretravel screw as it’s not production Legal. The overtravel is okay to use.
Don’t get the Cajun Race Hammer if you intend to shoot in SSP, it’s made by Cajun and isn’t SSP
legal (it is ESP legal, and USPSA Production Legal according to the DNROI ruling.)
As for the Reduced Reach Kit, the kit is perfectly legal, as it is a all internal mod; with the T2 disconnector and the firing pin block lifter.