If something made commercially has value to you, buy it. If it doesn’t have value to you, don’t buy it and use whatever method works well for you. These are personal choices. And I thank Malcolm for showing us this well made option and providing his comments. Personally, I would find this measuring tool attractive due to its multi project adaptability while retaining accuracy with easy setup. Yes, it’s an elevated story stick and one could make one for each project…if that’s what they prefer. But buying this does not make it wrong or worthless or stupid.