I don't have the spat anymore, to check blade location again, but there is a difference between the grip of the Nela and others I have seen (even though I acknowledge that you have more experience of various spats, firsthand).
The Nela grips
at the fulcrum point of the blade - i.e. the point at which the blade bends (this is potentially asking for trouble, especially when there is only 15mm of blade behind the fulcrum point). I can elaborate on this statement, if need be.
View attachment 45865
Furthermore, the Nela blade extends further forward from the fulcrum point than many competing spats, and thus is liable to bend more than the blade on many other spats, so it's a double-whammy. In my opinion,
it is not just a random coincidence that many competing spats grip the blade a long distance away from the fulcrum point - it is done with good reason (please note that for the purposes of our discussion I am referring to spats of 1 metre or longer). ...so, yes, some other spats do use friction grip, but they are exerting that grip
way aft of the fulcrum point.
The Ox blade bends in a similar manner to the Nela, but has an extruded bead that reliably locates it and prevents it from misaligning during use, rather than relying upon friction. In the event that the blade shifts a tiny fraction, due to the spat flexing during use, or hitting an obstacle, the blade is not prevented from re-settling to true, because it is not being held by friction.
View attachment 45866
As you know, the Superprof Comfort profile also has a blade that extends quite far from the handle, but, from what I can gather, its blade is forcibly held in place, with permanent indentations, rather than relying on friction. It is therefore unable to slip out of alignment.
View attachment 45860
The Nela spat has a totally smooth blade, on both sides.
I am not convinced by your explanation - no matter how you locate the blade (as it's currently designed), it is still held by friction and still not immune from tiny movement due to flexing of the handle. I am guessing that you are referring to locating the blade with its rear edge firmly pressed into the back of the gullet (i.e. ensuring there is no gap such as the one I've illustrated with yellow lines in the above photo). That will help stop the blade creeping any further into the handle, but I don't see how it will stop each end of the blade from creeping ever so slightly forwards (as it had, prior to taking that photo). I'm not just making a vague assumption, here. I can explain in detail how I think this blade creep may be occurring, but I don't want to bore forum members with a longwinded explanation.
To my understanding, the longer the spat, the more significant the issue is likely to be, because the more opportunity there is for the handle to flex under pressure, even though the Nela handle is well made and quite rigid. I am talking about tiny, tiny amounts of handle/blade movement, and all spats flex during use, but I feel it is a combination of tiny design decisions compounding into a problem with blade creep that (in my brief ownership of a Nela Edge) kept distorting the blade.
I've no desire for Nela to suffer bad publicity - mistakes and innocent oversights happen when designing, developing, and bringing new products to market, and I'm not knocking Nela for that - in fact, as I mentioned in an earlier post, it is very obvious from having held this spat that it is
beautifully made, and that Nela are sincerely trying to bring a high quality product to the market. The build quality is at least as high as anything else at the premium end of the spat market. It oozes quality. I respect that, and you will note that I didn't spill the beans several days ago, when I could have.
I took you at your word, and trusted your assertions that spare blades will be forthcoming.
I wouldn't have bought the spat in the first place if I didn't think Nela make decent quality products. I bought it in good faith and wanted to like it.
However, what doesn't sit well with me is having seen what I believe to be a serious problem with the spat and yet seeing it still being sold to tradespeople as though it's fit for professional use (which, at this point in time, I don't believe it is, in the larger sizes). That's not on.
I also want to be clear that I believe the design of this spat can potentially be modified by Nela to solve the issue. It has the potential to be one of the nicest spats on the market.