Ok, the LA is a little lighter and a little weight in the tail goes a very long way due to the distance from the CG. You are stuck with the weight. Do like Bruce said and move the battery as FAR forward as you can. Next, find a scale and weigh it. (balanced w/weight) You can check your wingloading and "see" what the effect of the weight is.
First get your wing area in inches. span x chord = area (sq in)
Divide by 144 to get the area in square feet. sq in/144=sq ft
Now divide the weight in ounces by the sq ft. oz/sq ft= wing loading
You've got the wingloading!
Now compare that with others. I think the average trainer is 16-20oz per sq ft.