Just ordered some springs for my rudder pedals to fit on the brake cylinders from the US
www.MCMaster.com 6389K625 x 1 pack (5)
9657K115 x 1 pack (12)
9946K13 x 4
This should stop the brakes from holding on. Will let you know if they arrive okay etc.
Also set the pedals slightly rearward by using an 1/8th spacer whilst drilling bottom hole.
Will also be using long bolts to hold pedals on - instead of two smal bolts per pedal.