Do you think it will balance that 5.1kg rig with the included 2.2kg counterweight?
I noticed a few photos shown the the Skywatcher what's up webcast
https://youtu.be/rUY29PJSitE where a few rigs that I guestimated to be around 5kg and they were all balanced with EQ6R counterweights. However, those rigs looked to have quite a high center of gravity. I'm sure it wouldn't be a problem if you rigged everything nice and low