Digesters: I just finished a 4 inch SkyJacker Soft Ride install and I am 2 inches lower in the rear than the front. Tech rep says he can sell me an Add a Leaf for 69 bucks, I say crapola. Can I (1) put in longer shackles in the back or (2) put a 1/2 inch lowering block in the front or any suggestions from you guys would be appreciated. TIA Al