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Rocker Ink Blotter With 5 mm Rod Paper Lock
A 110 x 45 mm rocker blotter with an R110 rocking face for fountain-pen and dip-pen ink. You change the paper without screws: cut a strip about 45 x 150 mm, tuck each end into a 1.2 mm slit that leads to a 6 mm groove, then push in a 45 mm length of 5 mm steel rod or dowel to lock it, like a screen spline. The ribbed open body keeps the material down, and a T-bar grip sits on top.
1 in PVC Rocking Footrest End Stand
This is one end of an under-desk rocking footrest. Print two of them and join them with two lengths of 1 in schedule 40 PVC pipe (33.4 mm OD), which sit in 33.8 mm blind sockets 25 mm deep. You can fix each pipe with a #8 screw through the 4.5 mm cross holes or with PVC cement. The stand is 160 x 109 x 28 mm with an R260 rocker arc on the bottom and open windows to save plastic. It prints face-down, so foot load goes into the plate across the layers' strong direction instead of peeling them apart.