Engineering your own voynich

[eggyk]

Out of curiosity, if you were to display the 106 groups with 1 possible decoding, are the other decodings relatively easy to guess from context?

I was just saying that number as tongue in cheek since byatan originally said: "In any case, don't worry, mine is reversible."

Yes. I think so, try for yourself:

Honestly, with that context it's genuinely not too difficult to guess the correct answer in most of the cases. There are situations where i'm pre-guessing the correct variation before looking at the options, like: 

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"[a]nd[a/b/c]not[h/x]erpersonwr{ig/it/td}e{gn/sd}ownwhic"

"[a/b/c]nd [a/b/c]not[h/x]er person wr{ig/it/td}e{gn/sd}own whic"

"and another person writes down whic"

With the context of what comes before this string, which is "one person enters text on the enigmas keyboard" I naturally insert the spaces. Then i'm expecting the first "and". The word "another" pops out as well, and before even looking at the options for "wr?" i'm thinking "writes". Even the end of this string lets me know almost certainly that the next decode will begin with an h, for "which". 

And then there are more difficult ones, with my natural thought process being something like:

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ch[a/b/c]ngedfore[a/b/c]chmessagethere[a/b/c]ei[u/v]i{dh/dx/ng/nt}st[a/b/c]tionh 

ch[a]nged fore[a/b/c]ch message there[a/b/c]ei[u/v]i{dh/dx/ng/nt}st[a/b/c]tion h

changed for each message there ?ei[v]i? station h

changed for each message the re?eiv? station h 

changed for each message the receiving station h

It's a good exercise for getting some insight into how many degrees of freedom are reasonable to expect from a potential VMS cipher decode method. If someone wants to provide a different english text formatted in the same way, it wouldbe cool to see how readable it is, and how long it would take.