exchange 2007 setup /m:recoverserver problem

I've reset the computer object in AD, made and updated a new server, joined domain with same name and IP. All FMSO roles are in same site as new server. I attempt recovery but get the error after setup copies the exchange files (COMPLETED) but when installing the Hub Transport Role--the first of 4 found roles to recover--(FAILED):
Cannot calculate value of property "AdminDisplayVersion": "The SerialNumber Version 8.1 (Build 302406) is invalid. The format should be 'Version <major>.<minor> (Build <build>.<revision>)' or 'Version <major>.<minor> (Build <build>.<revision>) : <file patch level>'".
I see the correct version numbers are populated in the object's 4 version attributes via ADSI edit. I see setup populated the server's registry with correct values under the various roles in the Exchange keys. Not sure what else to do except delete the sever in ADSI edit--there is no user data i have/need on this dead server's information store. I understand there is no Microsoft supported way of 'manually/forcefully' removing exchange from AD as with 2000/2003, however in this exchange 2007 article: the link at the bottom points to without mentioning that this isn't something recommended for 2007 (I mean, they link to it from a 2007 help page themselves).
Please tell me there's a check box I missed so I can do this correctly or let me know the manual/forceful removal is fine.
Who is Participating?

since there is no user data or mailboxes it is fine to remove the server object form the adsi edit and install the exchange roles as a fresh installation
thirdwavellcAuthor Commented:
since I didn't need to save anything on my 'dead' server, his reassurance that i can delete the object from AD worked, but I sure would like to have been able to get to the bottom of my problem and correct the error rather than get around it.
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