116v

[Jorge_Stolfi]

Erbsküchlein (Peacakes)

But that is a compound Erbs + küchlein, so that "s" is logically word-final...

Spislin (Skewer)

That is "Spis" plus the diminutive suffix "lin" (modern "lein") . 

Can we now accept the "8" in the "palsen" as a possible  “s” and the other "8" as possible “s” as well?

Not yet... Note that those "s" you found are just a bit taller than minim-height and are written like small "B"s (a straight vertical left stroke and a "3"-like right stroke.   The "8"s of You are not allowed to view links. Register or Login to view. are much taller and are drawn in a very different way, more like Voynichese d (an e-like left stroke, then a plume that loops, crosses itself, and ends on the baseline in a reverse-e stroke, completing a round body).

Moreover, it is not clear whether the writer would consider the hypothetical "palsen" to be a compound of "pals" + "en", like "Spislin" = "Spis + lin" and Erbsküchlein" = "Erbs" + "küchlein".  Your claim would be more convincing if you found an example ending in "-sen"  with an 8-shaped "s".

All the best, --stolfi