I'll have to check my Tamiya Beau, but as far as I can remember, the tailplanes are moulded upside down! I think the trim tab actuators are on the wrong side - top when they should be bottom, or vice versa. But I believe they are the wrong shape and size anyway, so you can just cut 'em off and replace with smaller ones, from rod or stretched sprue or whatever. I'll double check and let you know. They should show on the plans I sent you, given they are accurate of course!
One good thing about it though, if you wanted to model a Mk1, or earlier MkVI, you can just swap the tailplanes around, and, Hey Presto! Horizontal 'planes, no dihedral!!