Looks very nice if i my say made it my selve. Did not fully test the antenna.

Prusa I3 Pro B

No

Doesn't Matter

0,20

20% or more

Made this my selve 10 el yagi with andcaps its for 10 mm tube and 20x20mm boom.

Follow this link for bild instructions http://users.belgacom.net/hamradio/schemas/
yagi_uhf_antenna.htm no longer working it wasnt a link to my site here you can find the same info https://www.qsl.net/on6mu/schemas/yagi_uhf_antenna.htm