Spike kettles for brew stand

[rokfreek]

I am looking at getting 15g spike V3 kettles for my Brutus style stand. The supports above the burners are 12"x12". Spike has the diameter listed at 15.8 but the stepped bottom looks significantly smaller. Any one using these think there is going to be a problem?

 

[surgical_ass]

I just measured my spike 15 gal v3. The very bottom of the instep/pot measured 13" don't know if that helped. Btw they are great pots. I mash and boil in mine

 

[rokfreek]

Does help thanks