Strikes me that you need a different target design? Standard 40mm KZ hit gets 1 but an inner 25mm gets a 2 (and any splitter on the 25mm gives a 1!). Not sure how that might be designed and engineered for reliability but such a knockdown or flag-up mech would reward the elite but not put off the new shooter from taking up the sport.
Pity that electronic targets are so expensive as then you could have 0-10.9 scores :-)
BFTA Secretary 2012-2014
CSFTA Secretary 2014-2016