You have too much space between each ring of the handle. Also the activation button and steps underneath don't look right to me. The original seems a bit more complex to me.
And hollowing parts is a good thing to do, but you have to think about print orientation first for it to work with FDM printers, and not only through SLS printing. Right now the way your handle is hollowed would work with FDM only if you print the handle standing on top of the activation button.
An easy way to correct that would be to split the activation button from the handle, and make the two parts interlock with each other.