I am thinking of ordering a Citori Micro MIdas 20 gauge (they also make it in 12 gauge) for my son to shoot in the trap league. He shot this weekend with an 11-87 10 gauge with a 13" LOP. The Citori Micro Midas also has a 13" LOP but I'm sure it will be too short next year. How would I change the LOP next year and not spend a ton? Which adjustable system could I add to the 20 gauge Citori and still not be crazy expensive? I would like to keep a gun that is adjustable and I think this would be a good setup to loan new shooters. Would the 12 gauge be better long term for inexperienced shooters?