bouncy as in going over bumps and then it seems to float out of it sorta bouncy? throw some more rebound damping in, the stock springs shouldn't be that bad, though another kg or 2 wouldn't hurt. i'lll ask the real guy when he gets home, and having shit shocks in the fornt won't make the rear bouncy, unless you're diagnosing the problem wrong, i'd offer to come for a drive and have a feel but you know how it is