Wings and Things..
I have a Riffe Euro as well, not the New EuroX which is not really Euro if you consider the longer butt, it is just a mid handle revamped.
but I am thinking about variations on a theme as well, but more to the Euro side of the equation.
I am thinking that the 16mm stock bands dont give me enough power, but rather than bulking up on the gun, or shortening the stock bands (that wouldnt be any fun),
What I want to do with the Riffe 110 Euro is put two 18mm omer bands with SS wishbones, which should make the bolt snap a little faster and penetrate a little farther out. I really like the Safety on the Riffe as opposed to the Euro Safetys, but the Euro style is to break off, or dissassemble the safety and handle the gun cautiously that is why they are particullarly cheap plastic or with removeable buttons. some bluewater guns dont even come with safetys. I only wish the safety lever were a little closer to the handle so the thumb could more easily flip it on and off! As it is now I have to check it before every dive, but that is keeping things ultimately more controlled.
Back to Wings:
Wings make the gun much slower at vertically tracking, If you Aspetto you are likely to miss alot of shots trying to raise to the gun to the fish. If you dive bomb from the top the wings may help you. Shooting at the surface in waves seems to be worsened by wings, I missed a large Wahoo at the surface once because of that, and because I didnt dive a few feet to escape the turbulence trying not to spook the fish. I was using a 60" Andre with 4 bands, a 7mm Shaft and a sliptip that never touched the wahoo that turned away and revealed a profile as large around as my head! it must have been over 20lbs easy.
Riffe Wing Kit: I have looked at it in passing; As long as you can remove the wings later in the event you dont like em, it could only be a nice experiment. Why not?
Ultimately a Tool is only as good as its acceptance and practical use by the owner.
if you have the now old Riffe Euro wihtout the long butt, remember that any wings will make your wrist work harder tracking fish. I have thought about adding Surfboard Skegs, they are lighter, more hydrodynamic and have more surface area to prevent barrel lift with high power bands. If you epoxy in a surf insert you can add and remove them when you need them. your gun may look wierder but it just may function in the water better than wood wings. you could also make your own wood wings, as there are several unfinished kits available for much less.
If you have the NEW and not-so Euro styled Mid handled Riffe EuroX then wings wont be such an issue while using your second hand to guide the barrel through the water on the long stock butt.
good luck with the MOD.