If your savvy with a sewing machine you can sew some molle/pals webbing onto the top of your pack and add a large kifaru pocket on there. I'm going to add some webbing onto the sides of my terminus to add kifaru pockets on both sides. Going to be a chore but will be worth it in the end run to have all my ditty gear and phone etc on the outside organized in pockets.
I pretty much gutted the mr lid too. Cut out the shoulder straps, all the excess material. Don't know what the official weight is, but next to the standard lid on my Metcalf its significant.
Yeah I can see how you could save quite a bit of weight off of that MR lid for sure...two pockets large enough to hold full 3 liter water bladders is impressive. I personally don't see the appeal of a toplid daypack as I also take my "real" pack with me no matter what, as I really hate backtracking very fair to get it to so I can haul something.
Personally if I want to use a day pack I like the idea of my stuff sack doing the double duty though. The OR dry comp bag I've used works great for this and pretty large at 1500+ cu in and works great as a dry sack for your sleeping bag and clothes while hiking in and if you want to use it as a day pack from camp it'll keep everything dry as well. http://www.backcountry.com/outdoor-r...FTByQgod51kAOw
Has a sternum and waistbelt that converts into compression straps when in stuff sack mode and pockets on straps on the lid to hold tripods and spotters or whatever else you want to strap to the outside of a day pack.
No wrong way about it. Just another option to look into.