Sell it Roberto!!
My 52, was frustrating for me, shooting the same groups as you shoot with yours, at 50M - under 2". I sold it... actually I did a deal on a 54.
I can get true sub-1" groups at 50M with the 54 (plenty of shots, not just a 3 shot "group").
Anything that shoots 2" at 30yd should be launched in a catapult, the group may be better that way...