I have the RV10 MR16 wingtip light kit, and am planning on installing in my 9A wingtips, but can't say I've gotten around to that yet. I thought I remembered reading where someone did though.
I have Duckworks kits in my leading edges with 35W HIDs for landing lights. Planning on using the MR16's in the wingtips on a 3-way switch (off-on-wigwag), primarily in wigwag mode.