DST800

[kechikan]

Hello,
I would like to add a retractable triducer to my system,
Actually I have a itc5, I70, a65, a67, EV1, ACU100 and a p70 connected to a back bone.
I also have an old retractable seed and temp transducer ST800-P120 y would like to replace for the triducer.
¿are all plastic DST800 retractable?
¿Which model will fit in the housing for the ST800 and be conected to the ITC-5?
I know there is a model to be connected directly to the backbone, if I have the ITC-5 ¿is there any advantage on choosing this one instead of the one connected via ITC-5?

For the a67 I will be using a A80171, but I still want to be able to navigate only with the instruments on, and not the MDF, ¿will I have any interference when the two transducers are on?

Thank you