ORIGINAL: drumbum
funtana 90 does them killer.. mine takes some coaxing to get it in but after that it will lock deeper than any plane ive owned.
My FL330 has a very wide sweet spot for doing these. The F90 does them tight but has a little narrower (up elevator left aileron) spot. You can see how nice the F90 goes from the KE spin to inverted flat in the beginning of the Kyle Drop"n In video's
http://www.kyle.macapple.com/default_files/page0001.htm