Phil-
My protractor says you have about 20 degrees of up there. From the small horn arm, it seems that your bellcrank rotation must be restricted in some way, since the inside bellcrank-arm hole is usually sufficient to give the 30 degrees. You can move to an outer bellcrank arm hole, if you don't have room for it to rotate around 38 degrees (or more). You might also check your down deflection for bias. While, as Bob says, you should probably have 30 degrees available, more than one competitive stunt flyer claims to use less than 20. It really depends a lot on wing loading - how heavy the plane is for its size. One other thing to look out for is that, if you use the upper hole for the flap-elevator linkage, be sure to use a comparable hole spacing on the elevator horn, at least for the first flights.
I posted some bellcrank-flap geometry stuff that was met with underwhelming acceptance on SSW forum recently by couple of my on-line friends here, but you might find it interesting.
SK