Those are really good questions, they zero in on exactly what the issues are on what I suggested.
Here are some options for bikes that may fit the bill for you (I don't know your budget).
- Co-Motion makes several bikes that would work. Their frames are chrome-moly. They make a variety of models but here's one example:http://co-motion.com/bikes/deschutes
You already know about Lynskey and in a similar vein there's Habernaro :https://lynskeyperformance.com/road/touring-commuting/viale/https://www.habcycles.com/cross.html
And if you're prepared to really go upmarket you could go with a Moots:http://moots.com/bike/routt/
Although w what a Moots costs you can go to one of the better custom frame builders around.
One trouble w loading up a road bike with all the weight on the rear rack is that it can get squirely on the big downhills. I got a pair of the "everything" bags for the forks and a small frame bag and put any small and relatively heavy item in them to spread out the load and I haven't had an issue at any time since I did this.http://cleavelandmountaineering.blogspot.com/p/everything-bags.html
This Tubus rack will give you some extra heel clearance but I use the Tubus Fly w the smallest size Arkels panniers and thats enough storage for me and my heel doesn't hit.http://thetouringstore.com/thetouringstore/tubus-bicycle-racks-for-touring-and-commuting/tubus-logo-evo-rear-bicycle-rack/
And last, if I haven't given you enough to read already.... This link is to an excellent article on ultra-light touring that I have referenced repeatedly.https://www.crazyguyonabike.com/doc/?doc_id=9738
The fact that you only weigh 107 lbs is all the more reason to go light.