Hi Josh,
The EQ5 I did the test on is a Skywatcher, same brand as the HEQ5 & EQ6.
Dual drives are available from a lot of the Astro shops in Oz for EQ1, EQ2, EQ3 and EQ5, but I've never seen them as an accessory for
HEQ5's.
Andrews, Bintel, and MyAstroShop do sell the HEQ5 with them pre-fitted, making it a cheap mount.
Andrews - $950
http://andrewscom.com.au/site-conten...tm#accessories
Bintel - $999
https://www.bintelshop.com.au/Product.aspx?ID=7347
MyAstroShop - $1055
http://myastroshop.com.au/products/d...asp?id=MAS-042
Might be a better way to go, rather than trying to adapt something.
Regards
Ken