Cavo-varus orthotics

Dear all, Just wondering what the current range of opinions is regarding orthotic management of significant flexible and rigid cavo-varus, which corrects the hindfoot to neutral with a Coleman block test (ie FF valgus/RF varus scenario). Is there any preference for Fettig/Denton/Feehrey modifications or similar. I seem to never quite get the amount of control I need to correct the hindfoot…