Adjustable rifle rest

I wanted to build a rest for sighting in my firearms, but did not want to pay the 100s of dollars for a store bought one. So i took it upon myself to draw one up.

all parts are separate so as to be able to print in different orientation for strength. and should be sturdy enough for even large bore/caliber.

screw has been notched to the center hub so as to be able to adjust height one handed. 

i recommend minimum of 4 walls and 10% infill. tolerances are quite loose for those with less accurate printers. if the nut threads on too tight, scale x and y up a couple of percent.