We own a 2017 21rb- I recently purchased two Trojan t125 6v batteries. They will fit side by side in the stock angle rails, my concern is weight. Anyone upgrade to 2 6v batteries using the stock angle rails. Any recommendations on how to beef these up to support the weight of the 6v batteries. Only battery boxes I can find are black or chrome...does not match out tan/brown tt. Brainstorming ideas at this point and open to suggestions. Thanks.