Having back problems I needed also a lightweight strategy for the CWT.
Here are some tested but probably controversial ideas. Maybe some of them work for you:
* If you are happy to walk for over 40km, you can line up hotels, hostels and bothies so that you don't need a tent. The trail will deviate from Harveys, but not too far. I did that. Here is the walk report with the route:
https://www.walkhighlands.co.uk/Forum/viewtopic.php?f=25&t=67126In hindsight, I would have started with shorter distances at the beginning. I heard that Glenbeag bothy is a gamble now. But there are other options.
* Don't carry too much food. Food for lunch and chocolate can easily be restocked. Take pub meals into account, scavenge through freed food shelves in hostels. Sending a food parcel might also be a sensible idea. Never carry water. Bring a sawyers mini.
* Go spartanic. If you have three items of the same clothing type then you have at least one too many. Putting on wet socks in the morning sounds worse than it is. Ok, it is bad. But it can't be helped:)
* I don't believe in hardcore waterproofs. If the rain gives you a full frontal, you get soaked anyway. Rather have something which is comfy to wear and walk in if wet. Get a dry bag to store the dry clothes and the sleeping bag during the walking. And bring a candle to warm yourself in a bothy.
Enjoy, it is a great experience!