I've been playing with the pre-production versions for a while (actually, began using the Eclipse-type about 5 or 6 years ago).
The short-blade guide is very useful for small spokeshave blades. In this picture is the blade from a Stanley#84 .... which is about the narrowest blade I could find. If it can do this, then it can work with any spokeshave blade!
https://i.postimg.cc/FsLP4Q77/3.jpg
https://i.postimg.cc/sgCTf0hK/4.jpg
How about a skew blade from a side rebate plane?
https://i.postimg.cc/GmPq4JPR/6.jpg
Regards from Perth
Derek