I measured with Interstate GC2s but expect T-105s would be the same idea. Got about as rated when new; no real increase afterwards. I did get "progressive capacity loss" with successive 50-90s that I did see for sure. No way around that till you can do a "recovery" to 100% SOC afterwards on shore power.
If you are trying to get the most from the batts and you think they are not yet up to full capacity being too new, just run them down farther to 40% instead of 50% for the few times you will be doing that. Won't harm them. Just get that recovery done after you get shore power.