As for possesive apostrophes coming at the end of the word, this only applies still in cases of named persons/objects to accomodate names ending in "s" like e.g. "Marcus' Amiga was totally pimpin'" (just to give the post some pretense of being related to Amigas).
In this case, it'd also be acceptable to write "Marcus's Amiga".
However, possessive apostrophes at the ends of words also denote plurals... E.g. "My parents' house" (house belonging to more than one parent), etc.
And... as we're being picky, you might also want to check the spelling of "possessive" and "accommodate" ! :-)
Anyway... back to the original topic - great to see this, should make quite a few Workbenches look prettier!
- Ali