If you want to improve any of the aerobatic models - and be within the letter of the 10% rule
do this
get verified full scale drawing
clip span 9%
this gives you a new scale --with all dimensions , 10% larger than scale.
does it work?
yup - look at the fudged, current, popular stuff - essentially this is what has been done -except some simply have pushed the 10% as they see fit.
Don't fret over it tho- the horse is already out of the barn and you can bet your 16 channel Tx - it ain't going back in.
Go fly and enjoy it