The ruined castles: convenient hot end mount for the Ultimaker (drop-in replacement) - and an additional hotsink

I played a lot around hot ends lately, and even though my "banana" bushing blocks help tremendously (no need to remove the rods, pulleys nor recalibrate), the stock head mount is still very annoying to swap because you need to remove the X/Y small bars.

The remaning of the time I am usually using my alternate butterfly mount: http://www.thingiverse.com/thing:159390


Still, I needed an easy and safe fallback to demo the printer with the stock head. So I designed this. It quickly slides in p