>>1443224I don't know if they still do but varusteleka had Swedish army accessory straps for like 3 bucks a pair, they fit perfectly in the 2 extra slots in the yoke, or extend the straps already there.
I actually bought my "big" bag from there, the bundeswehr rucksack. It's rubberized fabric so fully rainproof. Did 50k with 35lbs over 5 days with it in the back country, love it.