This Is Also What Im Looking Into For The Fallowing Season. 2x4 Flu Pan And A 2x2 Front Pan.. I Have Just A 2x4 Flat Pan And The Evaperation Rate Right Know Its Great, The Problem Is Finishing It Off. With The Addition To A 2x2 Front Pan I Can Add Raised Flus To The Rear Pan Aand Add A Valve Between The Too, Should Have A Pretty Good Set Up If All Goes As Planed. P.ps Im Also Going To Make My Own Arch For Next Year, Going With The Angle Steel Approach.. Fired Bricked Lined And 10in Stack.. Wish Me Luck..