Next revision of the wafer holder/ tape stretcher.
I've thought a bit about the up vs. down stretch.
They each have their own quirks
I will call this one up(the second image in your set), there is not a lot of room around the pusher part and homing the machine is potentially problematic.
Pushing down I can't quite figure a good way to
a) load a frame
b) have the desired strength without becomming too bulky
Also both have issues with fitting motion components around, but I think those can be dealt with
4:14 a.m.
I will print off a few pieces tonight and see how I feel in the morning.