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This is a very odd drawing to look at. It's like an isometric and plan view drawing combined in the same drawing. The height of the main triangle is 12. It's shown on the side edge. I would probably start by drawing the 127 dia. centerline circle, then draw the three small dia. holes, then offset the holes to get the rounded corners of the triangle. Then you can draw the lines for the edges of the triangle using the Tangent Osnap. Then Trim everything and run the Polyedit command to join all the segments of the triangle into one continuous polyline. That should get you started. Let us know if you get stuck.

@f700es I don't even know what to say. I spent hours just trying to revolve the base and then struggled a ton with the extruding haha. You make it so easy. Thank you so much for that detailed explanation! You taught me more in this post than my lecturer did the entire semester haha.

That's straight 100% AutoCAD 2020 and nothing else. Yes I drew the profile in 2D 1st as that was the best way for me to figure it out. Once I finished the profile I mirrored it over to add dimensions to make sure that I got it correct. I then copied the center-line and right profile up a bit so I could revolve it. I made sure that the profile was a closed polyline before using the revolve command. I change the view to a SE view so I can everything. So I use the Revolve command, I just type in commands btw. I use the copied center-line as my axis and tell it 360 degrees. Once finished I got to front view and draw the circles and then do a polar array to copy them around. I then go back to a SE view. Then I explode the array so I can extrude the circles past the part. Then I use the subtract command to subtract the 3 rods from the part. After this I go back to top view and then changed the part color to a blue and slightly did a 3D view rotate to show the part in 3D. I then set a slight transparent visual style. BAZINGA!

If you want a selection set can do in a couple of ways ssadd the entlast or make a list using cons of the entity names. (ssadd [<ENAME>][<SS>]) Adds entities to selections sets. (setq ss (cons (entlast) ss) Dynamic radius maybe +5 -10 +23.45 look at the two parts - + and the xxxx, + - on own uses default inc. Use getstring input. Another using grips 'cal (rad + 10)

Yes, it refers to Lee Mac. With grread, you can't actually snap your cursor to any of the OSMODEs. Which is why Lee created that function to enhance grread, and I create GrPolar in that TracePoly link. I mean you can always do: (defun c:test ( / lst rtn) (setq lst (entlast) rtn (list lst)) ;; do your thing here (while (setq lst (entnext lst)) (setq rtn (cons lst rtn)) ) )