I have purchased both the swing out extensions AND the extra extensions and will likely mount them the same way you did to avoid losing anymore paint. I have a 3″ riser made from three 1″ sheets of 4 x 8 pink foam boards that are glued together with liquid nails. I also needed 3″ of clearance for my Lance 990. It works great and compresses very little. It also adds a layer of insulation to the camper floor. Unfortunately the HJ54FR extensions are out of stock at the moment. I’ll need them before I can finalize the purchase. Should be here next week.
Reply To: Need Advice on Camper Extenstion Brackers for Dually
