Alright, so I fear I've come off like an ass with my other posts so I'll try to answer the original question.
I have tried to polish my own trigger bars and connectors with a Dremel but have had limited success. Honestly, I don't really feel the difference was worth my time.
Now, fast forward to me getting my first kit from GT.com. It was a Challenger Kit. Here's the descrip.
I can really feel the difference between this kit and what I did myself. The polishing made for really smooth contact surfaces. The result of this and the reduced power springs really gave me a great feeling, lighter trigger. It's not something I would carry but it is great for IDPA. I really dig the adjustable OT as well, although I've never actually adjusted it. It was perfect for my liking how it came out of the package.The “CHALLENGER” is the tool you need at your next IDPA or USPSA match. There are no external modifications to this trigger. You will get a clean light trigger break and the short reset will help your follow up shots hit their mark. Let the trigger teach you, as you get the feedback you need to sharpen your trigger control skills.
The over-travel can be adjusted with the hex key provided. Just shoot and enjoy what a precision trigger can do for your game. APPROVED by USPSA and IDPA. For use in USPSA / Production and IDPA / SSP Divisions.
Includes:
•Smooth Trigger w/ Trigger Bar / Factory polished
•Trigger Housing w/ Ejector (adjustable over-travel) / Factory modified
•3.5 lb. connector
•Trigger spring
•Firing Pin spring / reduced power
•Firing pin safety spring / reduced power
•Extra spring cups
•Hex wrench / over-travel adjustment
Our Price ..........$134.95
Is the kit I am using for IDPA worth $135? To me I'd answer a YES wholeheartedly. I think spending $150 on something as integral as a GLOCK trigger kit is well worth it, especially when compared with a $2,000 AR setup in my safe that I'd probably never use for anything except talking about on the Internet. It also gets more play than a $200 bag for said carbine just because that's what the most popular on site X or a certain brand of jacket that.
The other kit I have is the Guardian kit. The difference in that one is not nearly as noticeable as the Challenger. However, it's still very nice.
Again, my apologies if I came across like a dick earlier. It's been a rouch couple of days.