I saw that PDF... I know i bitch a lot but this is another huge pain in the ass.... A lot of these mods are built for a specific PU. For example, I have a client with foreign currency mod (old extended solution). It was built by Blytheco for 2013 PU4. Am I supposed to approach Blytheco on 12/10 and ask that they upgrade this to PU 7 by 12/31? There are a lot of people on vacation, etc the last 2 weeks of December, including me. At what point next year will they tell us of the required PUs for each version? Is Blytheco going to ""emergency upgrade"" this for for free? I don't think so. If they charge, what is the best way to approach the customer? Mr. Customer, I know your annual maintenance has risen by 20% over the last 3 years and you haven't had jack shit in feature upgrades, but there is a $800 emergency programming charge you need to pay or you won't be able to run your payroll in 2015.