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Is there a way to make extrusions permanent?

Perhaps its a workflow issue on my end since I have only been using OnShape now for about 5 hours, but what is really throwing me off is that extrusions are not permanent per se. I like that I can modify them for future changes, but when sketching on a different plane, if I don't select the "Finaly" button none of my previous extrusions show up.
Perhaps I went about this the wrong way, but I am designing a bolt carrier for an airsoft gun. I sketched out all the detail I could on the front face and extruded backwards for depth on the part. Then to make the cuts and recess's I needed I created a new plane and sketch on the left face and started sketching there, Is that not how to do it?
Here is my model I am working on: https://cad.onshape.com/documents/10e9fb7205f6f00dd15179ae/w/3d6ebf2930172dc1a18adbaf/e/d4a41209be244bd16109bfb3
Please if there are any tips anyone can offer please do so. Like I mentioned earlier I have very limited experience in CAD as I am coming over from Sketchup.
Perhaps I went about this the wrong way, but I am designing a bolt carrier for an airsoft gun. I sketched out all the detail I could on the front face and extruded backwards for depth on the part. Then to make the cuts and recess's I needed I created a new plane and sketch on the left face and started sketching there, Is that not how to do it?
Here is my model I am working on: https://cad.onshape.com/documents/10e9fb7205f6f00dd15179ae/w/3d6ebf2930172dc1a18adbaf/e/d4a41209be244bd16109bfb3
Please if there are any tips anyone can offer please do so. Like I mentioned earlier I have very limited experience in CAD as I am coming over from Sketchup.
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Best Answer
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NeilCooke Moderator, Onshape Employees Posts: 5,808
steven_abiuso said:Hi Neil, thank you for the answer. I have a followup question for you though; If I need to reference the extruded geometry for a different sketch(my fillet and extrusions above that)do I need to start a sketch past all the extrusion commands on the feature list? I think the way I have it now Sketch 2 is before Extrude 14 thus not letting me select vertices or lines from that extrusion, am I correct here?Senior Director, Technical Services, EMEA5
Answers