Watching Jay siemans YouTube videos, it looks like you need an 8″ hole. No idea on availability. Garmin has a $200 rebate on livescope and a 9″ echomap for $699 at Cabelas. Probably get that a lot faster if you are not brand picky
Thanks, I already have 2 helix 10’s and was hoping to just get the mega live. I also drill with an older 8” Kdrill(which is more like 7.5”) so I’m hoping if I can find a transducer it will fit.