Unfortunately I have never used the payd version of Onshape but I like it a lot. There are more features in Solidworks but I think Onshape is a great program.
Wow, I’m a bit late to the party, but I’ve been following your tutorials and managed to draw this and get the correct mass of 1550grms! Didn’t have a clue how to make the one web thinner until I spotted Airwick using ‘split’. I then did extrude/remove, no problem, however that extrude would not mirror for the other side. Any ideas why? I had to do the split again and repeat to finish the model, so frustrating. ….and Mr Alex got the little boss wrong 36mm wide not 32mm 😉