I just had the master cylinder on my 1947 Dodge 1/2 ton bead blasted and honed. When looking in the resivoir there is a small hole and a larger hole going into the cylinder. The larger hole is drilled through into the cylinder but the smaller one does not go through to the cylinder channel. I am reluctant to drill it out. Can it function with one through hole or do you think the honing made it seal up. When I feel in the cylinder wall it is smooth and I do not see that it ever was all the way through from the resevior.