Yes, I have added 100 weight to my carrying capacity permanently. Did not know that levelling Stamina (as far as know, nothing tells you) increased your carrying cap. I played a pure Mage until level 20 or so anyway, so did not find out until recently, and for the first 5-15kg I thought it was a weird bug. I also added a few thousand when moving house from Whiterun to Windhelm.
Also, I downloaded a lockpicking mod. It shows me where the sweet spot is. Honestly only downloaded it because one of the Dwemer ruins had a Key Required door, and a Master Level chest next to it. I quicksaved, but constantly kept failing to open it and using up all my lockpicks. Turned out the key wasn't in the chest at all. Have still got the mod installed though, as losing out on loot just because I play a mage - thanks, Bethsoft, for removing the unlock spell - does not fly with me.