"Did your original roll down closure have buckles that had to mate down the sides of your pack to keep it closed?"
No.
"In cutting off you original roll down closure and creating the drawstring closure wouldn't your capcaity be minimally reduced?"
If it did I can't tell. But must have, a bit.
"How do you seal out the weather a.k.a. rain from the hole in the top?"
I use a pack liner to keep the key things dry. I usually ave enough left over material to roll over the top and the top strap keeps things closed.
"In creating the drawstring channel how many times did you roll down the material before sewing the channel?"
Just once with about a half inch folded under for a neat edge.
"I don't see the method that I use as all that heavy or complicated to use."
Aren't choices great!?! Two buckles and a velcro closure vs, a cord lock and loosening a strap. It is certainly quieter. Plus I won't snag stuff on the velcro. I don't like velcro…
"Congrats on your project. It seems to have turned out very well and your workmanship is excellent."
Thanks very much. I am pleased with the way it turned out.