I have never ventured beyond 30-35m for tyre/sled pulls. I would worry it may disrupt the mechanics of max velocity. However, if you bring the weight right down, it may not be a problem. Would your 10x30m be the entire session or would you put 1-2 ‘free’ runs in there as well. I imaghine you can’t put much more volume in, as then it simply becomes too high. When you talk about the neuromuscular excitation, were you seeing the benefits later in the session or in subsequent sessions (or both)?