Hisun efoil not working after lay up

My beloved hisun efoil has broken? I layed it up for the winter, now the controller doesn’t work! Probably water ingress causing corrosion over winter
Motor and batteries test like new but i need to replace esc with flipsky 75200 , i will not use flipsky 75100 as i have burn out three 75100s on other projects and they are no good for efoils

my question is? if I put the flipsky vesc and pwm (remote throttle reciever/transmitter ariel) all in a plastic waterproof box then placed into board? will i still get signal to remote

it is much easier to build and easier to waterproof if all electrics is in one box?

if al plastic signal have no problem (metal and carbon is the problem)
maybe just need to reconnect again …?

Yer, your right i have disassembled and tested, the only fault was cable’s were high resistance? This is due to water impedance
But unfortunately have already ordered new esc and associated hardware so will upgrade to vesc plus new uupgraded remote, thankyou for response, robin from UK

thanks there is only plastic between (remote transmitter ariel) and (hand operated remote)? so i will carry on with build, thanks for help