I use these, I have two, EQ5 legs bought the second to use with this
https://www.firstlightoptics.com/sky...nt-tripod.html
As you can see they happily mount my 120mm triplet Esprit on Skytee 2 head
You need to use a little common sense, there are £500 legs out there like the Geoptik Hercules too but the head you are looking at is £200, that is what I call real overkill, is supporting a 12.3 Kilo 120mm triplet, 1.5Kilo camera, and diagonal not enough ? Skywatcher EQ3 legs £100