Fins for high arches

[Nemrod]

I wear size 12 either Altemaras or 6.5 mm neoprene soft sole boots. Have been using Diverite XT or Apeks RK3 but both in XL are a bit loose. I can put on tighter springs but it just crams the foot into the pocket which is still too wide, and leads to other issues. I am looking for suggestions on a fin that is better for high arches or a method to open up the top of the pocket to make them more comfortable.

Scubapro Go Sport Gorilla. Open toe foot pocket is super comfortable and no worries about crammed up toes ever again. I have used RK3s and own Eddy Flips which I also love but the Go Sport is more comfortable. I also have high arches and wear a size 11 shoe.