hi everyone totally new to any type of forums so sorry if this is in wrong place for a starter was wondering if anyone could help me on drilling I'm new to it and seem to be over to the left all the time missing one way and overlapping the other I've tried everything measuring till my head hurts I've put a marker on front weight to line up with so i sit in same place all the time the only way I've found to get it somewhere near is to have one marker 5' longer than the other is this normal and sorry forgot to say its a 3 meter combination brand new