Inspired by the Prusa design I adjusted it a bit and it looks almost exactly like the original ... but the printing time is down to about 1,5 hours and I have adjusted the pattern so that no "bridges have to be built anymore.

You can take the Prusa Visor, but I recommend you to leave out the lower holes

I made a stackable version, see the pictures for a howto

you can allsow get Files form https://civilize.it