I often see a rook gun which has been converted to a .410. Is it feasible to line one back into a rook rifle. They seem like a very fun plinking gun. There was even a side by side rook/410 converted double in a recent auction. Getting the regulation back with linners must be difficult. But Ive know a few hobby gunsmith who liked difficult and seem to do very well with difficult. Can they be lined? Is this just another money pit? Anyone do one or have one done?