This is a remix of CR-10 x-axis belt tensioner by Gavitka, Gavitka's model fits perfectly for x-axis on the Ender 2 printer as well as CR-10. However for the y-axis on Ender 2 it needed modification so it wouldn't hit the bed.
I shortened the top side for the frame and the cap. Then I added a knob, from CR-10 X-Axis Realigned Tensioner by jneilliii, which I really like.
This model work for both x-axis and y-axis, however, I recommend using Gavitka's model for x-axis since it works just fine there.
Hardware needed for 1 part:
1x M5 25mm<
1x M5 nut
1x M4 20mm~
1x M4 locknut
-Optimized model for better fitting with belt/buildplate
-No support needed anymore
No support needed, print the frame standing
Modifided in sketchup and used add-on RoundCorners for round corners