Thats why i made that comment because Rider was saying that you could happily place a 10" on a HEq5... I know that is not true as i struggle with the EQ6 10" setup.
Astro photography 101
GET A OVERSIZED MOUNT OR ELSE GREIF BECOMEITH!
EQ1, - Department store barely useable
EQ2-3 Useable as a basic setup ( 2-5kgs max)
EQ 5 can be used for photography but light loads <8kgs
HEq5 good for photography at loads <10kgs
EQ6Pro Best of the low end budget mounts sweet spot for weight <15kgs
Anything over these kinda weights and things get a little unstable
Sure you can make it work and sometimes you will produce a stunning image but it takes alot of exp and hard work to do it.