For how long did Shredder have the Technodrome?

[neatoman]

There's a lot of things wrong with David Wise's writing, one of them keeping a logical timeline.

As an example of this, how long did Shredder have the Technodrome? The show clearly states that he used mutagen from the Technodrome to transform the turtles, who by the time the series actually start are skilled enough win fights in which they are outnumbered and outgunned.

The problem here is that Shredder explicitly wants to take over the world using the giant wheeled golfball but for whatever reason hasn't done so yet. Either him getting the Technodrome, mutating the Turtles and their training happened in very rapid succession (about a few days or so). Or he has had the Technodrome for years and simply never made a real move until the start of the series.

And there really isn't much of a logical balance here either, it still falls apart if we try to say it happen in about six months or so, because that's still ample time to take over the world and not enough to learn advanced martial arts.