when putting in a Blackheart board in a gun I`ve found that there are 2 x types UK + USA, if you can get the USA one, I`ve found it`s a much better board, I`ve also found that Blackheart boards UK seem to make little to No difference to standard,
I was the Manager for Paintball Direct for sometime and had to fix Heaps of guns with customers asking for the Blackheart boards to be put in the guns.
It was an accident how I found out about the USA boards and after this anybody that bought a gun from the Shop with this up-grade ... Rocked !!!