Finally decided to do it, my first make your own pack. After quite a bit of searching, deciding, made up mind, changing mind etc., I came across Dave C’s 610 pack, and decided to closely replicate it (with a tip of a cap to him).
I find that pockets on packs are like stuff sacks, the more you have the more “stuff” you carry. Stripped down including 1.5” nylon hipbelt, sternum strap, frame sheet it’s 21.7oz. With the removable pocket (1.82 oz) it’s a total of 23.52oz. I still have to cut a few straps here and there, so my target is 23.5oz. which I’m happy with.
For my first pack I’m pretty happy with it, shoulder straps were the most difficult to find the right angles and attachment points with both at rest and when in use with the load lifters (although they aren’t really necessary).
The removable pocket attachment was very similar to Chris Piechel’s DX40 pack, which allows for a clean finish with things not hanging everywhere, which I like. I prefer to stay off trail as much as possible so this is a nice feature. I haven't tested the volume exact but guessing around 30L. Let me know if there are any questions, thanks for looking.