Today, I was finally able to spend some quality time on this build. Including a dremel, here are my supplies:
Using a dremel and files, I was able to level the polymer to the jig. I took my time and it was a 35 minute job.
Begin sanding with 600 grit.
Smoothed rough edges with diamond files and 1000grit and wd40. Holes drilled and bits were provided, BUT I used a 3mm bit for the small holes because the kit contained a 7/64 bit and people complained it was too small for the pins. The 3mm worked perfectly and the pins are a perfect fit.
Completed a function test on the trigger and something is not right. It squeezes and fires, but feels incomplete.
I saw this video on YouTube and this explains and corrects my trigger problem.
Finally, I ran into this problem.
I bent the slide release spring pretty bad, while inserting the slide release. A failed function check and I removed it. Tried reshaping it, and I couldn't make it work.
Didn't attempt to connect the upper because I didn't want to create or compound the problem.
Assembly Glock parts in this lower wasn't difficult, but they are a few things to know. The locking block has rails, and is provided in the kit with two tiny screws. You must remove the raised plastic on the rails in that area because the locking block will not fit. Everything fits tight, including the trigger mechanism. Highly recommend using a 3mm bit for the small 2 pin holes. Function check is your friend. Finally, be patient because it is a process and isn't a simple drop in kit.
Tomorrow, I will make the polymer adjustments to correct the trigger, Order a replacement spring, and will smooth out the rear slide area to prepare to fit the upper.
Total time working on this was 3hrs