Thanks Rick. Yes, minn kota RT70. I entertained the idea of using the RTA-17 when I purchased motor. But considering its price and its function, i dont need quick access to remove the motor and couldn't justify paying the price for a glorified mounting block lol. More concerning tho was its stiffness. As you know, the 170 bow is not flat, rather having a convex shape. Didn't want the hassle of having to also fab shims to allow for flush mount.
I ordered a HDPP cutting board from amazon, $15. Cut to mount size, drill holes, done. And plenty of spare board for future use.