Does anyone know where I can get a PDF of a pre-2008 Hayward D.E. Pro-Grid Filter manual? All the new manuals are for the models that have the newer style clamp and air-bleed filter. I am looking for the older manual that used the ECX5000 Clamp/Spring. I tried the Wayback machine but the website I was using hayward-pools.com only started in 2011, so perhaps Hayward used a different website before that or maybe their exists a PDF for the older D.E. filters. No response from Hayward yet.