Hmm, think about it...Ben would have no reason to lie to Luke about something like that. He wouldn't gain anything by telling him that it was his father that had wanted it as opposed to telling him that HE wanted it...which I think is the truth in this case since he feels that Luke's the only hope for the Jedi. Also, at this point, Obi-Wan hadn't told a lie to Luke yet, he only starts lying to him when he asks him about how his father died...which is obvious because he looks nervous and break eye-contact with Luke while saying it. So IMO, he has no reason to lie, so why do it when it's unnecesarry? ...it's debatable though...
And believe me, I rethought the material on my site many times...otherwise I wouldn't have posted it

"May I recommend a better approach to the Grievous problem?
Have him walking tall and powerful, ala Clone Wars, at the beginning. Then, have Anakin take Dooku's red saber after the battle. At one point in the bridge battle, in which we could hopefully have some Grievous dueling Obi-Wan and Anakin, Anakin gets pushed away, and finally, just ignites Dooku's saber and throws it like a spear and hits Grievous in the chest. Grievous collapses and starts coughing while he hits the deactivate button (Basically, this just removes the need to see the last ep of Clone Wars to know why Grievous coughes). Grievous could ignite the saber and throw it out the window, then maybe grab it in space and then use it against Obi-Wan on Utapau."
Nice... I am seriously going to think about adding your idea to the site...good job.... BTW if u have more ideas like this, use my email or the other thread that I mentioned...it keeps things organized and makes my job easier. Great idea though...