Add photointerruptor ITR9608-F footprint

This is my first contribution attempt to include the footprint for a photointerruptor ITR9608-F.

(I will try to draw the 3D model next. The schematic has been submitted under kicad-symbols!3582 (merged).)

I have a number of remaining questions:

• The component has a small circle (which looks like pin 1) drawn next to pin 3 and a picture of a diode clearly drawn on the package. I find it helpful to partially replicate the picture from the component on the silkscreen. But I'm confused how to properly do the pin 1 marking in order not to mix it up with the dot on the package. How should the pin 1 marking be done in a proper way (that is currently missing)?
• Is it ok to include the vertical lines marking three parts of the component?
• How do I decide how to orient / rotate the component? (it's rotated correctly with pin 1 in the upper left corner)
• I cannot decide what drill hole size and what pad size to use. Kodenshi LG206L uses 0.7 mm. The datasheet for this component says 4□-4 (is that 0,4 mm?), so maybe a smaller hole size might work as well? (0.8 mm is fine)
• I was copy-pasting some elements in a text editor. How do I ensure that tstamps are all ok?
• Is it really necessary to center the component to pin 1? (This makes it pretty annoying to place it at the correct location on the board when I need to adhere to certain dimensions constraints.)

Datasheet:

My first attempt at drawing the footprint:

A similar existing component (Kodenshi LG206L):

Screenshot from EasyEDA (as found here):