Yeah, the 10% is awful. I'm afraid I don't see the point of resetting to something almost as bad.
Why not create default growth tables based on total size, one for data and one for logs? Typically a size of anywhere from 5-20% works well for data and/or logs, modified to take into account existing file sizes, disk space available, etc..
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".