wanhao duplicator 4s z-axis-brace and bushing

SummaryThis brace I created for the wanhao duplicator 4s will greatly improve your prints by eliminating z-axis swing.. first two pics of other things is showing the weird swirls and rounded waves before I installed the brace. the last pic shows how straight the lines are after I installed the brace.InstructionsI printed the brace in abs at 70% infill. try to keep print speed low. (I ran mine at 45) (could have done 35 or 40) I used support for just the bushing housing. I printed the bushing in pla at 100% infill. no raft for either brace or bushing.