Lambdaholder 2X

This is a slight remix of the great Lambdaholder thing by tinkerdoodle - now 2x taller to be used with a tablet.

Q: Why not just 2xscaling in the slicer?
A: I wanted to keep the original thickness, but scale the size.

I then also added some fillet to the joint to make it more durable in this bigger size.

STATUS: Printing the 1st proto. Feels a bit bendy, but not sure it's whether good or bad. Will see.