What does it matter really as long as it's within the rules. I've had a play with a few of the top boolocks target rifles and there great tools absolutely but I'd sooner have me boingers as there more fun to me. I agree with those that say the adjustability of there stocks are there biggest advantage/making the rifle fit the shooter rather that the shooter making hiself fit the rifle, but it's been proven over and over the top shots are still usually the top shots no matter what rifle their piloting. I'd still rather have me a springer though and I truly doubt them with a £3000 combo have any more fun than I do with my £330 combo
As long as it's within the rules it's all good!