Clean out the RTA, and put anti-seize on the outside of the bushing will make it easier. There's a beveled edge on both sides of the bushing to get in seated in the RTA easier, that in conjunction with clamping the bushing and using the MIS tool to pull the bushing into the RTA will get it in there.
2001 ///M3 Cabriolet Titanium Silver/Imola Red/6SPD
Tools available in Hampton Roads area:
-RTAB tool -Shim kit -Timing tool