My original solution

I had 2 up front and the rear at first .Then I purchased a 2nd set of shock collars, adjusted the original all the way sdow, then installed the 2nd, spring, spring seat, now I still do this sometimes just because I like how it looks standing tall. For speed those bump stops get tightened pretty much all the way, then you can go as fast as you like

I put them on the back on this one cause I have been running a Leopard 4092 and I'm afraid jumping and having the chassis slap in the back may cause the motor mount to bend cause its so long. Haven't had any problems but I don't want to so been using this for awhile now and very happy so far.

Are there any downsides to this? Does it affect the handling?

I haven't had any negative effects running the dual shocks. It does however pretty much eliminate chassis slap in the back and depending on who you ask that can be good or bad.

No duals in the front?