Flat Rate Shipping on Certain Items only

We sell lots of products that are heavy and we like how the fedex interface works for those products.... however, we also sell lots of items that are less than an ounce and ship FLAT RATE.  Is there a way to work around the shipping system so that the few items we want to ship flat rate can be and at the same time that flat rate offer is not available for items that weigh 118 pounds?

Decals ship USPS for $3.25 First Class

When a customer checks out the custom rate set for this also shows up for an exhaust system weighing 85 pounds.... don't want customers to think they can choose that option for heavy item's

W

katharina wrote: Create a custom shipping option called flat rate and restrict it to a weight range.  Katharina

OK, I see how that can work.... there is no way to target a product or category?  As strange as it sounds we would like to have several flat rates for flat packages and boxed that are all very light.

I looked into the following:

Flat rate based on order quantity
Flat rate based on order weight
Incremental calculation based on order quantity

The weight may be a solution but yet it can still create issues I believe.... really wish the product build included the ability to assign a shipping profile to it with rules