Hmmm, I have been thinking about the many post saying the trim is altered quite some on the 633.
When strapless no issue unless you got a supershort board.
On a very similar wing, the Ketos 1200 cm2 Surf wing I dont move my feet around more than on my 790 cm2 wave wing (strapless that is), and I stand in the same place on both btw, not any noticeable difference.
This is on purpose, so one can use straps (or hooks) if desired.
Meaning the trailing edge of the wing is moved back (because on both big wings the chord is a lot wider) and the AOA set so you got the same neutral trim.
My take on this difference is, the 633 sticks further out in front of the mast and might have a bit higher AOA too - both will make you need loads of front foot pressure (or another strap/hook trim).
On the Moses, I can see the 633 trailing edge is at the same position as other wings, and I would think the AOA is slightly bigger too - meaning you have to move forward for a neutral trim.
Just some deduction to understand why they are different in terms of having the same trim or not
Here my smallest wavewing (used mostly for jumping nowadays where we use bigger wavewings in waves) where you can see the trailing edge is a bit in front of the mast:
And here you can see the 1200 or in this case the 1400 cm2 wing, how the trailing edge is moved back, to keep the balance point like with the other wings:
Shimming the 633 stab a bit will help a little indeed, but at some point it wont work well when too much AOA so it eventually lifts up maybe
Above explains the difference - both wings works awesome and can only be recommended for the surfy style of riding when lighter winds at least, but you have to move the Moses back on some tracks, or shim the fuselage if possible, or stand further forward if strapless - maybe add an extension pad
Back to your post Tom - as said I dont move my feet around more when on the 1200 cm2 than on the smaller wings, so straps would work just fine - eventhough like you say, "Why use straps" on such wings???
I could ask the same, why use hooks when you dont stand in them anyways - your strap/hookless waterstart skills will get really bad/slow if you use the hooks only for this, and you will miss the sensation and advantages of having a clean deck - it just feels good