Congrats Gams!! That is quite an increase in a short time---you must have all the right stuff
When I first started doing STS rotations, I went in to Play It Again Sports to purchase a 50lb DB for my 1 arm rows (needed 70lb db by the time I finished, and mb could have gone higher if I had the chance to try---STS rocks!)
There was a teenage boy at the desk when I checked out--- I used every ounce of strength to make it look effortless when I placed the DB on the counter (using only my right arm haha). The look on his face was priceless