Best/most comfy Vac Extenders for 6.75 Girth ?

I remember the X4 extender having a large girth base, but I think I’m going to finally splurge on a vac extender, and is like to hear strong opinions on which vac extenders are best for us guys with larger girths ?

Thanks everyone :)

Phallosan looks great, as does the Penimaster Pro, but maybe everyone who has used these could chime in about their pros and cons and especially the sizes of the larger sluice/chambers/etc ?

Thanks :)