I do have the utmost respect for your technical ability and have read with interest many of your posts and consider you far more knowledgeable than myself. I have indeed carried out many "modifications" that could sometimes be considered an improvement on the original. If you have found that it worked and are happy with it then I don't see much of a problem. Especially if it is your own vehicle as there will be no comebacks. What I was concerned about was that if Bryan did drill some holes and perhaps they were too large or too many of them it would probably cause problems when the tank is low on fuel. As I understand this type of system, it uses the return flow from the pump to keep the swirl pot full and needs to fill from the bottom to be able to draw fuel in from the rest of the tank. If it has holes it can only maintain the contents at the same level as the rest of the tank. Because of the way this works, any foreign matter can be drawn in by the venturi and then as soon as the pump stops working, the matter can just float off into the bottom of the tank. On inspection or even removal of the swirl pot the cause may not be apparent. On the next journey it can be drawn back into the venturi within minutes causing serious head scratching.
Best Wishes,
Bryan