Hi I have just joined the forum and hoped someone might be able to help with my inquiry. I'm new to detecting so please bare with me. I've just purchased the gpz7000 and with the shafts fully extended, I find its only barely long enough. Is there an adjustment I don't know about? Or is this the longest the shafts go? I'm not tall but I think tall people would have trouble if this is the full length available on this machine.