Dovetail/Clamp needs to attach SVBony 70ED to both, a Star Adventurer Pro 2i and a StarTravel 120 scope.

[Mark2022]

I have just recently bought a Star Adv Pro 2i, a Skywatcher Star Travel 120 on an EQ5 mount and also a 70ED from SVBony. My thought was to piggyback the SVBony on the StarTravel but also use it for widefield, out in the field, with my Star Adventurer occasionally. I am forever scratching my head on how to achieve this since the dovetail on the SVBony doesn't have the right type holes at the right spacing to fit on the StarTravel screw and hole on the top of the rings and neither can I attach it to the declination extension on the Star Adventurer. Does anyone have a clue how this can be easily and least expensively achieved? One issue in this hobby seems to just lead to another and I'm losing the will to live. Thanks.

Oh and if anyone has a spare tripod top which fits an EQ5 mount, please let me know.