Nice! I did that once about two years ago when setting up my new-to-me bow. I drilled up the tailpipe like yours did. I was shooting some tight groups. I didn't shoot or bow hunt last year so I am not grouping very tight yet. But I will get lots more practice before season opens this year.
Yea, This is my second time but it is still cool. I herd a weird sound and expected the worst. I am sooting into a garage that is not mine so I was worried. I was happy in more ways than one when I found out what the noise was. I am darn lucky I hit the target.
Pretty cool the first couple times, after that, they get a picture taken and pulled apart. I have one left that I left together, all the rest were pulled apart. Congrats on being able to hit the SAME spot twice. Consistency in form results in consistency in arrow flight.