A method of estimating dimensions of an opening in a body comprises filling the opening with a fluid that absorbs an electromagnetic radiation. Two or more barrel liners are provided for cartridges of differing calibers. In a pseudo-random phase, the decompressorPRPG generates pseudo-random test patterns that are applied to scan chains within the circuit-under test. A new aligned data bus is then formed such that the last A1 bit occurs on the data bus for a given clock cycle and the first A2 bit occurs on the data bus during the next clock cycle.