Looks good. I try to stay away from small hard rods when checking my C/G. When checking your C/G on a rod, you have a few pounds of weight sitting on a very small and sharp edge (your sponson) and if you are not super careful it can chip your edges. I prefer to use large wooden dowels such as 5/8 to 3/4 diameter (Lowes or Home Depot). You can still chip the edges but not quite as easily. 7-1/4 is a great base line C/G for stock 3.5 engines on a Lynx. You may tweak that slightly after running it but probably not by much. One more thing, I would turn those tanks around so that you can keep your fuel lines as short as possible. Reconfigure your pickup lines to pull fuel out of the lower-rear-port side of your tanks.
-Carl
