Two which are driving me nuts : 34 down 11 letters :Man in charge succeeded,folowing chosen area of technology
E-E-T---I-S
AND
47 across 11 letters : Point defined in relation to triangle moving to the corner?
--T-O-E-T-E
Any help appreciated - still got a way to go (top left proving troublesome) but will k.b.o. as Churchill once said