Hi :We have completed many projects on our 1920's Craftsman home. Do you have any information on installing slate & stone walks? We are trying to replace the concrete sidewalks around our home and have seen several varieties of these walks. They usually have gravel between the larger slate pieces, but this is difficult to keep neat & clean, esp when the leaves start falling in Oct. Have you seen any products which can stabilze this small gravel between the larger slate pieces without the appearance of too much concrete/mortar? Collingswood, NJ