bigduke6, first off there will be NO whining or crying, when your daughter starts to outshot you at the range.
That said, I think you have the perfect idea with the “6.1, 6.2, 6.3, etc…” small bore classification;
6.1 – Original small bore as issued (WZ-78, M-69, 44US, etc…)
6.2 – Same as above with changed iron sights
6.3 – Same as .1 with ANY scope or added optics
6.4 – Open Small Bore, to include commercial rimfire stock or modified, ie. “Ruger 10/22”. Commercial arms, stock or modified, can ONLY be shown in this class. (changed barrel, modified trigger, addition of bipods or rests to stock, etc…)
6.5 – STOCK small bore military reproductions (m1-22, stg-44, m15-22, etc…)
If any changes or modifications are done to one of the STOCK reproductions, just re classify as above. Change the iron sights (some people have replaced the poly sights on the M1icon-22 with steel sights from Kensington with better results to them) you now have class “6.5.2”. Add a scope or holo sight to your M15-22, class is now “6.5.3”

If there is an objection to the addition of “commercial” rifles in class 6.4 they can be removed. I just figured if you have modified an original “Military Trainer” to this extent, you might as well have something from modern standards to gauge it against. Also by keeping it to the ONLY class that commercial rifles can compete in, whether it is stock or modified makes no difference.

Just my $0.02, and I have no clue what the target should be. I do hope that the range is set to 25 yards/meters as most of my indoor ranges are limited to this distance.
Looking forward to a FUN YEAR ahead, and a Happy New Year to ALL!