I'm currently using Victor MX70 and was wondering if TK-6000 will have faster smashes. I couldn't clear very far back to back with my MX70 3u 24lb with plastic shuttles and my smashes were weak. Arm gets a little tired too but didn't really smash. Which one is stiffer and should I switch? Will I have faster clear and smash if I get TK-6000 4u because it's faster?