AI blade mounting options

[Harpo]

For those of you using the AI blades how are you mounting them? I drew this up in fusion 360

 

[slingfox]

I use two HMS light mounts to hold up three AI Blade. Pictures in My Tank Thread

 

[skdeepak88]

I use two HMS light mounts to hold up three AI Blade. Pictures in My Tank Thread

Did you have to get extension arms or was the basic hms single arm mount enough to fit 3 blades ?