I think the work you have done is quite significant,, I mean the completion of two versions of OG is fantastic. If you still need more material, then Powerprep & different other GMAT test softwares can serve the purpose.
Secondly, this site is a sea of GMAT material, search whatever you want and enjoy it.
In case of any pariticular help, kindly let us know.
Best of luck and Welcome to our community!!!
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