i was thinking of getting a new helix9 di g4n for my bow. probably gonna upgrade to an ultrex this summer or next winter and want to connect to the depthfinder so i can use all the features of the motor. from what im hearing the g4s are way backed up. im seeing some gen 3s on sale. so my question is if i go with the gen 3 i can still interface with the ultrex correct? does anybody know what the up grades are in th gen 4?