I need some help deciding to got a .020 dowel set.I got it down to .013 at 2 oclock and .000 at 8 oclock and I am wondering if I can go with a .020 dowel and get it down to just a few thou.What do you think?dowel set .021 at this time I have 3 bolts that will not thread and are hitting the hole in the 2 lower block holes and 1 on the upper holes.