This is so cool. Unfortunately, my sight glass would fall off.
just leave the little spot where you have you sight glass hole drilled.
I mounted my eye bolt as low as I could get it in anticipation of doing this.
I will just leave a tiny bit of material around where the eye bolt connects to. im sure you could do the same just relocate your hole lower and leave it attached.
I can sketch up a photo of what I'm talking about, but I don't think it would look bad all at.
-=Jason=-